Transactions
| Date | Player | Transactions |
| 3/27 | Junior Fernández, P | Sent to Minors |
| 3/26 | Génesis Cabrera, P | Sent to Minors |
| 3/26 | Andrew Knizner, C | Sent to Minors |
| 3/26 | Alex Reyes, P | Sent to Minors |
| 3/18 | Austin Dean, RF | Sent to Minors |
| 3/18 | Edmundo Sosa, SS | Sent to Minors |
| 3/18 | Justin Williams, RF | Sent to Minors |
| 3/18 | Jake Woodford, P | Sent to Minors |
| 3/9 | Yairo Muñoz, SS | Cleared Waivers and Became a Free Agent |
| 3/7 | Elehuris Montero, 3B | Sent to Minors |
| 3/7 | Yairo Muñoz, SS | Released |
| 3/7 | Alvaro Seijas, P | Sent to Minors |
| 3/5 | Ricardo Sánchez, P | Sent to Minors |
| 2/12 | Jordan Hicks, P | Placed on 60-Day IL (Recovery from right elbow surgery) |
| 2/12 | Brad Miller, 2B | Signed as Free Agent ( 2020)(one-year contract) |
| 2/6 | Ricardo Sánchez, P | Acquired Off Waivers Seattle |
| 2/6 | Ramón Urías, SS | Designated for Assignment |
| 1/23 | Matt Wieters, C | Signed as Free Agent ( 2020)(one-year contract) |
| 1/14 | Austin Dean, RF | Traded Miami (for OF Diowill Burgos) |
| 1/10 | John Gant, P | Signed ( 2020)(avoids arbitration) |
| 1/7 | Óscar Hernández, C | Signed to a Minor League Contract |
| 12/18 | Adolis García, RF | Designated for Assignment |
| 12/18 | Kwang-Hyun Kim, P | Signed as Free Agent ( 2020-2021)(two-year contract) |
| 11/27 | Dominic Leone, P | Cleared Waivers and Became a Free Agent |
| 11/25 | Dominic Leone, P | Released |
| 11/20 | Dominic Leone, P | Designated for Assignment |
| 11/20 | Elehuris Montero, 3B | Purchased From Minors |
| 11/20 | Alvaro Seijas, P | Purchased From Minors |
| 11/20 | Jake Woodford, P | Purchased From Minors |
| 11/13 | Adam Wainwright, P | Signed as Free Agent ( 2020)(one-year contract) |
| 11/4 | Joe Hudson, C | Refused Minor League Assignment - Free Agent |
| 11/4 | Marcell Ozuna, LF | Tendered Qualifying Offer (declined) |
| 11/4 | Williams Pérez, P | Declared Free Agency |
| 11/1 | Brett Cecil, P | Removed From 60-Day IL (Carpal tunnel syndrome, left hand) |
| 11/1 | Jordan Hicks, P | Removed From 60-Day IL (Torn UCL, right elbow) |
| 11/1 | Joe Hudson, C | Outrighted to Minors |
| 11/1 | Lane Thomas, CF | Removed From 60-Day IL (Fractured right wrist) |
| 10/31 | Tony Cingrani, P | Removed From 60-Day IL (Left shoulder impingement) |
| 10/31 | Tony Cingrani, P | Declared Free Agency |
| 10/31 | Marcell Ozuna, LF | Declared Free Agency |
| 10/31 | Michael Wacha, P | Declared Free Agency |
| 10/31 | Adam Wainwright, P | Declared Free Agency |
| 10/31 | Matt Wieters, C | Declared Free Agency |
Last updated Mar. 30, 1:12 A.M. ET
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