| | SS | Traded (for cash considerations) To |
| | LF | Signed to a Minor League Contract (Signed) |
| | SS | Designated for Assignment (Signed) |
| | CF | Acquired Off Waivers (Signed) From |
| | LF | Signed to a Minor League Contract (Signed) |
| | P | Designated for Assignment (Signed) |
| | 3B | Signed as Free Agent (one-year contract) |
| | LF | Acquired Off Waivers (Signed) From |
| | 2B | Outrighted to Minors (Signed) |
| | SS | Signed (loses arbitration) |
| | P | Cleared Waivers and Became a Free Agent (Signed) |
| | 2B | Signed to a Minor League Contract (Signed) |
| | P | Signed (wins arbitration) |
| | P | Released (Signed) |
| | 2B | Acquired Off Waivers (Signed) From |
| | LF | Acquired Off Waivers (Signed) To |
| | P | Signed to a Minor League Contract (Signed) |
| | LF | Designated for Assignment (Signed) |
| | LF | Signed as Free Agent (four-year contract) |
| | P | Signed to a Minor League Contract (Signed) |
| | SS | Signed to a Minor League Contract (Signed) |
| | 3B | Signed to a Minor League Contract (Signed) |
| | P | Acquired Off Waivers (Signed) From |
| | LF | Acquired Off Waivers (Signed) From |
| | P | Signed (avoids arbitration) |
| | P | Signed (avoids arbitration) |
| | 2B | Signed to Play in Japan (Chiba Lotte Marines) |
| | SP | Signed to a Minor League Contract (Signed) |
| | SP | Drafted Via Rule 5 (Signed) |
| | LF | Drafted Via Rule 5 (Triple-A phase) |
| | P | Signed (avoids arbitration) |
| | P | Signed (avoids arbitration) |
| | LF | Free Agent - No Contract Offer (non-tendered) |
| | 3B | Signed (avoids arbitration) |
| | P | Signed to Play in Japan (Hokkaido Nippon-Ham Fighters) |
| | P | Signed as Free Agent (one-year contract) |
| | SS | Acquired Off Waivers (Signed) From |
| | P | Purchased From Minors (Signed) |
| | P | Signed as Free Agent (one-year contract) |
| | P | Signed as Free Agent (one-year contract) |
| | P | Declared Free Agency (Signed) |
| | RF | Declared Free Agency (Signed) |
| | LF | Declared Free Agency (Signed) |
| | 2B | Declared Free Agency (Signed) |
| | SS | Declared Free Agency (Signed) |
| | P | Declared Free Agency (Signed) |
| | RF | Declared Free Agency (Signed) |
| | RP | Declared Free Agency (Signed) |
| | 3B | Declared Free Agency (Signed) |
| | CF | Signed as Free Agent (one-year contract) |
| | P | Declared Free Agency (team option declined) |
| | 3B | Declared Free Agency (Signed) |
| | LF | Declared Free Agency (Signed) |
| | P | Declared Free Agency (Signed) |
| | P | Reinstated From Restricted List (Signed) |
| | RF | Declared Free Agency (Signed) |
| | 2B | Declared Free Agency (Signed) |
| | P | Declared Free Agency (Signed) |
| | C | Declared Free Agency (Signed) |
| | P | Declared Free Agency (Signed) |
| | P | Declared Free Agency (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Cleared Waivers and Became a Free Agent (Signed) |
| | P | Released (Signed) |
| | 3B | Purchased From Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | C | Called Up from Minors (Signed) |
| | 3B | Called Up from Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Removed From 10-Day IL (Left elbow inflammation) |
| | P | Called Up from Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | CF | Called Up from Minors (Signed) |
| | C | Called Up from Minors (Signed) |
| | 3B | Purchased From Minors (Signed) |
| | P | Transferred to 60-Day IL (Left shoulder fatigue) |
| | P | Sent to Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Sent to Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Placed on 10-Day IL (Left shoulder fatigue) |
| | P | Sent to Minors (Signed) |
| | P | Cleared Waivers and Became a Free Agent (Signed) |
| | P | Removed From 10-Day IL (Back spasms) |
| | P | Sent to Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Sent to Minors (Signed) |
| | P | Sent to Minors (Signed) |
| | 3B | Signed to a Minor League Contract (Signed) |
| | P | Sent to Minors (Signed) |
| | P | Released (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Sent to Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Designated for Assignment (Signed) |
| | P | Placed on 10-Day IL (Left elbow inflammation) |
| | P | Called Up from Minors (Signed) |
| | 3B | Outrighted to Minors (Signed) |
| | 2B | Removed From 10-Day IL (Bone contusion, right wrist) |
| | P | Called Up from Minors (Signed) |
| | P | Placed on 10-Day IL (Back spasms) |
| | 3B | Designated for Assignment (Signed) |
| | 3B | Sent to Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Sent to Minors (Signed) |
| | P | Sent to Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | 1B | Cleared Waivers and Became a Free Agent (Signed) |
| | P | Called Up from Minors (recalled as 29th roster player) |
| | P | Sent to Minors (Signed) |
| | P | Return of 27th man (return of 29th roster player) |
| | 1B | Released (Signed) |
| | 1B | Designated for Assignment (Signed) |
| | P | Traded (for two players to be named) From |
| | C | Return of 27th man (return of 29th roster player) |
| | C | Called Up from Minors (recalled as 29th roster player) |
| | P | Sent to Minors (Signed) |
| | C | Sent to Minors (Signed) |
| | LF | Removed From 10-Day IL (Left wrist inflammation) |
| | P | Purchased From Minors (Signed) |
| | CF | Sent to Minors (Signed) |
| | RF | Removed From 10-Day IL (COVID-19 injured list (exposure)) |
| | C | Called Up from Minors (Signed) |
| | P | Removed From 10-Day IL (Esophageal constriction) |
| | P | Sent to Minors (Signed) |
| | P | Sent to Minors (Signed) |
| | CF | Called Up from Minors (Signed) |
| | RF | Placed on 10-Day IL (COVID-19 injured list (exposure)) |
| | 1B | Removed From 10-Day IL (Strained left hamstring) |
| | P | Sent to Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | LF | Placed on 10-Day IL (Left wrist inflammation) |
| | RF | Outrighted to Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | 1B | Traded (for cash considerations) To |
| | P | Sent to Minors (Signed) |
| | P | Return of 27th man (return of 29th roster player) |
| | P | Called Up from Minors (recalled as 29th roster player) |
| | P | Sent to Minors (Signed) |
| | P | Acquired Off Waivers (Signed) From |
| | P | Placed on 10-Day IL (Esophageal constriction) |
| | P | Called Up from Minors (Signed) |
| | P | Outrighted to Minors (Signed) |
| | P | Removed From 10-Day IL (COVID-19 injured list) |
| | RF | Designated for Assignment (Signed) |
| | C | Sent to Minors (Signed) |
| | 2B | Placed on 10-Day IL (Bone contusion, right wrist) |
| | 1B | Placed on 10-Day IL (Strained left hamstring) |
| | C | Called Up from Minors (Signed) |
| | RF | Reinstated From Restricted List (opting back into 2020 season) |
| | P | Sent to Minors (Signed) |
| | P | Designated for Assignment (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Refused Minor League Assignment - Free Agent (Signed) |
| | P | Outrighted to Minors (Signed) |
| | P | Designated for Assignment (Signed) |
| | P | Purchased From Minors (Signed) |
| | P | Outrighted to Minors (Signed) |
| | RF | Sent to Minors for Rehabilitation (Signed) |
| | RF | Reinstated From Restricted List (no longer opting out of 2020 season) |
| | C | Removed From 10-Day IL (COVID-19 injured list (positive test)) |
| | C | Removed From 10-Day IL (COVID-19 injured list (positive test)) |
| | C | Sent to Minors (Signed) |
| | C | Sent to Minors (Signed) |
| | RF | Removed From 10-Day IL (Undisclosed injury) |
| | P | Sent to Minors (Signed) |
| | P | Called Up from Minors (Signed) |
| | P | Designated for Assignment (Signed) |
| | RF | Placed on 10-Day IL (Undisclosed injury) |