| | | Sunday, February 28th, 2021 | | Placed SP Walt Peterson on the active roster. |
| Saturday, February 13th, 2021 | | Signed free agent SP Walt Peterson to a 1-year contract worth a total of $20,600,000. |
| Sunday, January 24th, 2021 | | Placed C Loren Thomas on the active roster. |
| Saturday, January 9th, 2021 | | Signed free agent C Loren Thomas to a 5-year contract worth a total of $93,250,000. |
| Saturday, December 26th, 2020 | | Signed free agent SS Richard Thompson to a 1-year contract worth a total of $970,000. |
| Tuesday, December 15th, 2020 | | Signed free agent 3B David Clark to a 2-year contract worth a total of $3,010,000. |
| Wednesday, November 25th, 2020 | | 2B José Rivera becomes a free-agent. | | SP António Rúbio received a 1-year contract through automatic renewal worth a total of $400,000. | | SS Lorenzo Castillo becomes a free-agent. | | C Paul Perry received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Albert McDonald received a 1-year contract through automatic renewal worth a total of $400,000. | | CF Woody Slater received a 1-year contract through automatic renewal worth a total of $400,000. | | 3B Cristián Suárez received a 1-year contract through automatic renewal worth a total of $400,000. | | SS Grant Nutt received a 1-year contract through automatic renewal worth a total of $400,000. | | CF David Fairlie received a 1-year contract through automatic renewal worth a total of $400,000. |
| Sunday, November 22nd, 2020 | | RF Tony Garza received a 1-year contract through arbitration worth a total of $1,602,000. | | SP Norberto Pérez received a 1-year contract through arbitration worth a total of $2,464,000. | | SP John Blue received a 1-year contract through arbitration worth a total of $2,064,000. | | RF Francisco Gonglas received a 1-year contract through arbitration worth a total of $3,644,000. | | MR Chris Kelley received a 1-year contract through arbitration worth a total of $1,430,000. | | MR José Martínez received a 1-year contract through arbitration worth a total of $765,000. | | MR John Newton received a 1-year contract through arbitration worth a total of $4,400,000. | | MR Rafael Durán received a 1-year contract through arbitration worth a total of $2,112,000. | | 3B Kevin Bowen received a 1-year contract through arbitration worth a total of $600,000. | | LF José Canó received a 1-year contract through arbitration worth a total of $2,400,000. | | CF Eugene Delaney received a 1-year contract through arbitration worth a total of $625,000. |
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