| | | Saturday, January 30th, 2021 | | Signed free agent C Ralph Patterson to a 1-year contract worth a total of $800,000. |
| Sunday, January 17th, 2021 | | Signed free agent CF Brian Jordan to a 3-year contract worth a total of $18,450,000. |
| Thursday, January 7th, 2021 | | Signed free agent SP Kevin Jones to a 1-year contract worth a total of $5,230,000. | | Signed free agent SP Denny Taylor to a 1-year contract worth a total of $3,250,000. |
| Saturday, January 2nd, 2021 | | Signed free agent MR Raúl Domingo to a 1-year contract worth a total of $820,000. |
| Saturday, December 26th, 2020 | | Signed free agent CL Joseph Page to a 2-year contract worth a total of $22,000,000. |
| Sunday, December 20th, 2020 | | Signed free agent SP Daniel Sherman to a 1-year contract worth a total of $1,500,000. |
| Friday, December 18th, 2020 | | Signed free agent MR David Elliott to a 3-year contract worth a total of $21,000,000. |
| Thursday, December 17th, 2020 | | Signed free agent SP Larry Burke to a 2-year contract worth a total of $25,000,000. |
| Wednesday, November 25th, 2020 | | 1B Kyle Ryan received a 1-year contract through automatic renewal worth a total of $400,000. | | 1B Robert Hobbs received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Sumio Kokawa received a 1-year contract through automatic renewal worth a total of $400,000. | | C Chris Trent received a 1-year contract through automatic renewal worth a total of $400,000. | | RF Mike Setser becomes a free-agent. | | 2B Ray Moore received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Quinton Beard received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Luis Mateo received a 1-year contract through automatic renewal worth a total of $400,000. | | CF Eric Duthie received a 1-year contract through automatic renewal worth a total of $400,000. | | LF Manolo Peña received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Marty Smith received a 1-year contract through automatic renewal worth a total of $400,000. | | CL Werner Sims received a 1-year contract through automatic renewal worth a total of $400,000. | | 3B Eric Conrad becomes a free-agent. | | 2B Alex Holland received a 1-year contract through automatic renewal worth a total of $400,000. | | SS Bob Wilson received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Ernie Martin received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Josh Taylor received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Weston Merritt received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Fernando García received a 1-year contract through automatic renewal worth a total of $400,000. |
| Sunday, November 22nd, 2020 | | MR John Farris becomes a free-agent. | | C Hitomaro Sato becomes a free-agent. | | 2B Phil Murray received a 1-year contract through arbitration worth a total of $800,000. |
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