| | 三壘手 | Declared Free Agency (INF Josh Harrison elected free agency.) |
| | 投手 | Signed (The Cincinnati Reds signed LHP Justin Wilson.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Connor Phillips to the minors.) |
| | 右外野手 | Sent to Minors (The Cincinnati Reds sent OF Conner Capel to the minors.) |
| | 左外野手 | Sent to Minors (The Cincinnati Reds optioned OF Bubba Thompson to the minors.) |
| | 游擊手 | Sent to Minors (The Cincinnati Reds sent INF Erik González to the minors.) |
| | 二壘手 | Sent to Minors (The Cincinnati Reds sent INF Mark Mathias to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Christian Roa to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Carson Spiers to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Casey Legumina to the minors.) |
| | 左外野手 | Sent to Minors (The Cincinnati Reds optioned OF Rece Hinds to the minors.) |
| | 中外野手 | Sent to Minors (The Cincinnati Reds optioned OF Jacob Hurtubise to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Lyon Richardson to the minors.) |
| | 二壘手 | Sent to Minors (The Cincinnati Reds sent INF Tyler Callihan to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Rhett Lowder to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Zach Maxwell to the minors.) |
| | 捕手 | Sent to Minors (The Cincinnati Reds sent C Mat Nelson to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Chase Petty to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent LHP Reiver Sanmartin to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent LHP Jacob Heatherly to the minors.) |
| | 捕手 | Sent to Minors (The Cincinnati Reds sent C Michael Trautwein to the minors.) |
| | 中外野手 | Sent to Minors (The Cincinnati Reds sent OF Blake Dunn to the minors.) |
| | 游擊手 | Sent to Minors (The Cincinnati Reds sent INF Edwin Arroyo to the minors.) |
| | 捕手 | Sent to Minors (The Cincinnati Reds sent C Daniel Vellojin to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Julian Aguiar to the minors.) |
| | 二壘手 | Non-roster Invitee (The Cincinnati Reds invited INF Tony Kemp to spring training.) |
| | 二壘手 | Signed (The Cincinnati Reds signed INF Tony Kemp to a minor league contract.) |
| | 投手 | Signed (The Cincinnati Reds signed RHP Vladimir Gutierrez to a minor league contract with an invitation to spring training.) |
| | 投手 | Designated for Assignment (The Cincinnati Reds designated RHP Levi Stoudt for assignment.) |
| | 左外野手 | Claimed on Unconditional Release Waivers (The Cincinnati Reds claimed OF Bubba Thompson off waivers from the Minnesota Twins.) |
| | 三壘手 | Non-roster Invitee (The Cincinnati Reds signed INF Josh Harrison to a minor league contract with an invitation to spring training.) |
| | 捕手 | Non-roster Invitee (The Cincinnati Reds invited C Mat Nelson to spring training.) |
| | 捕手 | Non-roster Invitee (The Cincinnati Reds invited C Daniel Vellojin to spring training.) |
| | 投手 | Traded (The Cincinnati Reds traded RHP Daniel Duarte to the Texas Rangers.) 至 |
| | 投手 | Designated for Assignment (The Cincinnati Reds designated RHP Daniel Duarte for assignment.) |
| | 投手 | Signed (The Cincinnati Reds signed LHP Brent Suter.) |
| | 投手 | Signed (The Cincinnati Reds signed RHP Alan Busenitz to a minor league contract.) |
| | 捕手 | Non-roster Invitee (The Cincinnati Reds invited C Austin Wynns to spring training.) |
| | 投手 | Non-roster Invitee (The Cincinnati Reds signed LHP Justin Bruihl to a minor league contract with an invitation to spring training.) |
| | 捕手 | Designated for Assignment (The Cincinnati Reds designated C Austin Wynns for assignment.) |
| | 投手 | Signed (The Cincinnati Reds signed RHP Frankie Montas.) |
| | 投手 | Signed (The Cincinnati Reds signed RHP Buck Farmer.) |
| | 左外野手 | Designated for Assignment (The Cincinnati Reds designated OF Bubba Thompson for assignment.) |
| | 投手 | Signed (The Cincinnati Reds signed RHP Brett Kennedy to a minor league contract.) |
| | 一壘手 | Signed (The Cincinnati Reds signed INF Jeimer Candelario.) |
| | 中外野手 | Drafted Via Rule 5 (The Cincinnati Reds selected OF Alexander Ovalles in the Rule 5 Draft.) |
| | 二壘手 | Drafted Via Rule 5 (The Cincinnati Reds selected INF Levi Jordan in the Rule 5 Draft.) |
| | 投手 | Drafted Via Rule 5 (The Cincinnati Reds selected RHP Brock Bell in the Rule 5 Draft.) |
| | 游擊手 | Non-roster Invitee (The Cincinnati Reds signed INF Erik Gonzalez to a minor league contract with an invitation to spring training.) |
| | 游擊手 | Signed (The Cincinnati Reds signed INF Erik González to a minor league contract.) |
| | 投手 | Signed (The Cincinnati Reds signed RHP Nick Martinez.) |
| | 二壘手 | Signed (The Cincinnati Reds signed INF Mark Mathias signed to a minor league contract.) |
| | 投手 | Signed (The Cincinnati Reds signed RHP Emilio Pagán.) |
| | 投手 | Released (The Cincinnati Reds released RHP Derek Law.) |
| | 投手 | Released (The Cincinnati Reds released LHP Reiver Sanmartin.) |
| | 三壘手 | Released (The Cincinnati Reds released INF Nick Senzel.) |
| | 左外野手 | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of OF Rece Hinds from the minors.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of RHP Christian Roa from the minors.) |
| | 中外野手 | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of OF Jacob Hurtubise from the minors.) |
| | 投手 | Declared Free Agency (RHP Manuel Cachutt declared free agency.) |
| | 投手 | Declared Free Agency (RHP Zack Brown declared free agency.) |
| | 投手 | Declared Free Agency (RHP Ryan Nutof declared free agency.) |
| | 投手 | Declared Free Agency (RHP Ricky Karcher declared free agency.) |
| | 捕手 | Declared Free Agency (C Jhonny Pereda declared free agency.) |
| | 游擊手 | Declared Free Agency (INF Steven Leyton declared free agency.) |
| | 投手 | Declared Free Agency (RHP Ben Lively declared free agency.) |
| | 投手 | Declared Free Agency (RHP Ryan Meisinger declared free agency.) |
| | 投手 | Declared Free Agency (RHP Mac Sceroler declared free agency.) |
| | 投手 | Declared Free Agency (RHP Eduardo Salazar declared free agency.) |
| | 捕手 | Declared Free Agency (C Chuckie Robinson declared free agency.) |
| | 投手 | Declared Free Agency (RHP Teddy Stankiewicz declared free agency.) |
| | 投手 | Declared Free Agency (RHP Danis Correa declared free agency.) |
| | 一壘手 | Declared Free Agency (INF Jason Vosler declared free agency.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Graham Ashcraft.) |
| | 投手 | Activated (The Cincinnati Reds activated LHP Reiver Sanmartin.) |
| | 捕手 | Declared Free Agency (C Curt Casali elected free agency.) |
| | 投手 | Activated (The Cincinnati Reds activated LHP Nick Lodolo.) |
| | 一壘手 | Declared Free Agency (INF Joey Votto elected free agency.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Carson Spiers.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Levi Stoudt.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Casey Legumina.) |
| | 游擊手 | Activated (The Cincinnati Reds activated INF Jose Barrero.) |
| | 二壘手 | Activated (The Cincinnati Reds activated INF Matt McLain.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Tejay Antone.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Lyon Richardson.) |
| | 左外野手 | Activated (The Cincinnati Reds activated OF Bubba Thompson.) |
| | 捕手 | Activated (The Cincinnati Reds activated C Curt Casali.) |
| | 中外野手 | Activated (The Cincinnati Reds activated OF TJ Hopkins.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Daniel Duarte.) |
| | 中外野手 | Declared Free Agency (Cincinnati Reds OF Harrison Bader declared free agency.) |
| | 投手 | Declared Free Agency (Cincinnati Reds RHP Buck Farmer declared free agency.) |
| | 投手 | Declared Free Agency (RHP Vladimir Gutierrez declared free agency.) |
| | 左外野手 | Claimed on Unconditional Release Waivers (The Cincinnati Reds claimed OF Bubba Thompson off waivers from the Kansas City Royals.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Ben Lively outright to the minors.) |
| | 投手 | Designated for Assignment (The Cincinnati Reds designated RHP Ben Lively for assignment.) |
| | 投手 | Declared Free Agency (RHP Alan Busenitz declared free agency.) |
| | 投手 | Declared Free Agency (RHP Justin Dunn declared free agency.) |
| | 右外野手 | Declared Free Agency (OF Henry Ramos has declared free agency.) |
| | 投手 | Declared Free Agency (RHP Brett Kennedy declared free agency.) |
| | 投手 | Declared Free Agency (RHP Silvino Bracho declared free agency.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Justin Dunn outright to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Connor Overton outright to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Brett Kennedy outright to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Vladimir Gutierrez outright to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Alan Busenitz outright to the minors.) |
| | 三壘手 | Released (The Cincinnati Reds released INF Michel Triana.) |
| | 二壘手 | Released (The Cincinnati Reds released INF Alejo Lopez.) |
| | 投手 | Released (The Cincinnati Reds released RHP Michael Mariot.) |
| | 游擊手 | Released (The Cincinnati Reds released INF Matt Reynolds.) |
| | 投手 | Released (The Cincinnati Reds released RHP Alec Mills.) |
| | 游擊手 | Released (The Cincinnati Reds released INF Ilvin Fernandez.) |
| | 投手 | Released (The Cincinnati Reds released RHP Kevin Herget.) |
| | 捕手 | Released (The Cincinnati Reds released C Andy Yerzy.) |
| | 投手 | Released (The Cincinnati Reds released RHP Matt Pidich.) |
| | 右外野手 | Released (The Cincinnati Reds released OF Ashton Creal.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of RHP Alan Busenitz.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Carson Spiers to the minors.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Carson Spiers from the minors.) |
| | 投手 | Placed on 15-Day IL (The Cincinnati Reds placed RHP Daniel Duarte on the 15-day injured list.) |
| | 游擊手 | Released (The Cincinnati Reds released INF Kevin Newman.) |
| | 游擊手 | Designated for Assignment (The Cincinnati Reds designated INF Kevin Newman for assignment.) |
| | 右外野手 | Released (The Cincinnati Reds released OF Hunter Renfroe.) |
| | 投手 | Placed on 60-Day IL (The Cincinnati Reds placed RHP Graham Ashcraft on the 60-day injured list.) |
| | 中外野手 | Placed on 10-Day IL (The Cincinnati Reds placed OF Harrison Bader on the 10-day injured list.) |
| | 左外野手 | Activated (The Cincinnati Reds activated OF Stuart Fairchild from the 7-day injured list.) |
| | 右外野手 | Designated for Assignment (The Cincinnati Reds designated OF Hunter Renfroe for assignment.) |
| | 投手 | Released (The Cincinnati Reds released LHP Chasen Shreve.) |
| | 投手 | Activated (The Cincinnati Reds activated LHP Alex Young from the 7-day injured list.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Connor Phillips from the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Carson Spiers to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Connor Phillips to the minors.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Carson Spiers from the minors.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Ben Lively from the 10-day injured list.) |
| | 投手 | Placed on 15-Day IL (The Cincinnati Reds placed RHP Tejay Antone on the 15-day injured list.) |
| | 投手 | Designated for Assignment (The Cincinnati Reds designated LHP Chasen Shreve for assignment.) |
| | 投手 | Activated (The Cincinnati Reds activated LHP Brandon Williamson from the 7-day injured list.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Kevin Herget outright to the minors.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Hunter Greene from the 10-day injured list.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Carson Spiers to the minors.) |
| | 二壘手 | Activated (The Cincinnati Reds activated INF Jonathan India from the 10-day injured list.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Lyon Richardson to the minors.) |
| | 二壘手 | Sent to Minors (The Cincinnati Reds optioned INF Alejo Lopez to the minors.) |
| | 一壘手 | Activated (The Cincinnati Reds activated INF Joey Votto from the 10-day injured list.) |
| | 投手 | Placed on 7-Day IL (The Cincinnati Reds placed LHP Alex Young on the 7-day injured list.) |
| | 二壘手 | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of INF Alejo Lopez from the minors.) |
| | 左外野手 | Placed on 7-Day IL (The Cincinnati Reds placed OF Stuart Fairchild on the 7-day injured list.) |
| | 投手 | Designated for Assignment (The Cincinnati Reds designated RHP Kevin Herget for assignment.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Fernando Cruz from the 10-day injured list.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Michael Mariot outright to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Casey Legumina to the minors.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Lyon Richardson from the minors.) |
| | 投手 | Signed (The Cincinnati Reds signed RHP Danis Correa to a minor league contract.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of RHP Kevin Herget.) |
| | 投手 | Designated for Assignment (The Cincinnati Reds designated RHP Michael Mariot for assignment.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Brett Kennedy to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Alan Busenitz outright to the minors.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Casey Legumina from the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds returned RHP Lyon Richardson to the minors.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of RHP Michael Mariot.) |
| | 投手 | Placed on 15-Day IL (The Cincinnati Reds placed LHP Brandon Williamson on the 15-day injured list.) |
| | 二壘手 | Sent to Minors (The Cincinnati Reds sent INF Alejo Lopez outright to the minors.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of LHP Chasen Shreve.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Connor Phillips from the minors as a substitute player.) |
| | 投手 | Placed on 7-Day IL (The Cincinnati Reds placed LHP Brandon Williamson on the 7-day injured list.) |
| | 投手 | Placed on 15-Day IL (The Cincinnati Reds placed RHP Graham Ashcraft on the 15-day injured list.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Lyon Richardson from the minors.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Tejay Antone from the 60-day injured list.) |
| | 投手 | Placed on 15-Day IL (The Cincinnati Reds placed RHP Fernando Cruz on the 15-day injured list retroactive to Aug. 31.) |
| | 中外野手 | Sent to Minors (The Cincinnati Reds optioned OF TJ Hopkins to the minors.) |
| | 投手 | Sent to Minors (The Cincinnati Reds sent RHP Tony Santillan outright to the minors.) |
| | 右外野手 | Activated (The Cincinnati Reds activated OF Jake Fraley from the 10-day injured list.) |
| | 投手 | Placed on 15-Day IL (The Cincinnati Reds placed RHP Ben Lively on the 15-day injured list retroactive to Aug. 31.) |
| | 投手 | Designated for Assignment (The Cincinnati Reds designated RHP Alan Busenitz for assignment. ) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of RHP Carson Spiers from the minors.) |
| | 中外野手 | Activated (The Cincinnati Reds activated OF Harrison Bader.) |
| | 右外野手 | Activated (The Cincinnati Reds activated OF Hunter Renfroe.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Brett Kennedy from the minors.) |
| | 中外野手 | Designated for Assignment (The Cincinnati Reds designated OF Michael Siani for assignment.) |
| | 投手 | Placed on 10-Day IL (The Cincinnati Reds placed RHP Hunter Greene on the 10-day injured list.) |
| | 二壘手 | Designated for Assignment (The Cincinnati Reds designated INF Alejo Lopez for assignment.) |
| | 中外野手 | Claimed on Unconditional Release Waivers (The Cincinnati Reds claimed OF Harrison Bader off waivers from the New York Yankees ) |
| | 右外野手 | Claimed on Unconditional Release Waivers (The Cincinnati Reds claimed OF Hunter Renfroe off waivers from the Los Angeles Angels.) |
| | 一壘手 | Released (The Cincinnati Reds released OF Trey Mancini.) |
| | 中外野手 | Sent to Minors (The Cincinnati Reds optioned OF Michael Siani to the minors.) |
| | 投手 | Designated for Assignment (The Cincinnati Reds designated RHP Tony Santillan for assignment.) |
| | 二壘手 | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of INF Alejo Lopez.) |
| | 二壘手 | Placed on 10-Day IL (The Cincinnati Reds placed INF Matt McLain on the 10-day injured list with a right oblique strain. ) |
| | 左外野手 | Activated (The Cincinnati Reds activated OF Stuart Fairchild from the 7-day injured list.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Brett Kennedy to the minors.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Daniel Duarte from the minors.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Ben Lively from the 15-day injured list.) |
| | 投手 | Placed on 15-Day IL (The Cincinnati Reds placed LHP Alex Young on the 15-day injured list.) |
| | 投手 | Sent to Minors (The Cincinnati Reds returned RHP Lyon Richardson to the minors.) |
| | 一壘手 | Placed on 10-Day IL (The Cincinnati Reds placed INF Joey Votto on the 10-day injured list with left shoulder discomfort. ) |
| | 三壘手 | Recalled From Minors Rehab (The Cincinnati Reds recalled INF Nick Senzel from the minors.) |
| | 右外野手 | Sent to Minors (The Cincinnati Reds sent OF Henry Ramos outright to the minors.) |
| | 一壘手 | Signed (The Cincinnati Reds signed OF Trey Mancini to a minor league contract.) |
| | 一壘手 | Signed (The Cincinnati Reds signed OF Trey Mancini to a minor league contract.) |
| | 投手 | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Lyon Richardson from the minors.) |
| | 左外野手 | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of OF Nick Martini.) |
| | 中外野手 | Recalled From Minors Rehab (The Cincinnati Reds recalled OF Michael Siani from the minors.) |
| | 右外野手 | Designated for Assignment (The Cincinnati Reds designated OF Henry Ramos for assignment.) |
| | 左外野手 | Placed on 7-Day IL (The Cincinnati Reds placed OF Stuart Fairchild on the 7-day injured list.) |
| | 投手 | Sent to Minors (The Cincinnati Reds optioned RHP Alan Busenitz to the minors.) |
| | 投手 | Activated (The Cincinnati Reds activated RHP Hunter Greene from the 60-day injured list.) |
| | 游擊手 | Placed on 10-Day IL (The Cincinnati Reds placed INF Kevin Newman on the 10-day injured list.) |
| | 三壘手 | Recalled From Minors Rehab (The Cincinnati Reds recalled INF Noelvi Marte from the minors.) |