| | | Monday, November 23rd, 2020 | | CF C. Marshall received a 1-year contract through arbitration worth a total of $6,500,000. | | C R. García received a 1-year contract through arbitration worth a total of $750,000. | | CF R. Días becomes a free-agent. | | MR J. Fuller received a 1-year contract through arbitration worth a total of $861,100. | | SP P. Guardado received a 1-year contract through arbitration worth a total of $4,900,000. | | 1B L. Atkins becomes a free-agent. | | RF B. O'Crean received a 1-year contract through arbitration worth a total of $4,900,000. | | MR K. Ono received a 1-year contract through arbitration worth a total of $750,000. |
| Friday, October 2nd, 2020 | | Signed SS R. Moore to a 2-year contract extension worth a total of $2,640,000. |
| Wednesday, September 30th, 2020 | | 1B J. Landry was claimed off waivers from Belding. |
| Friday, July 3rd, 2020 | | Signed free agent 3B E. Edwards to a 1-year contract worth a total of $700,000. |
| Sunday, June 21st, 2020 | | Signed LF P. Martinez to a 2-year contract extension worth a total of $29,000,000. |
| Thursday, December 19th, 2019 | | Signed SP C. Tyler to a 2-year contract extension worth a total of $2,100,000. |
| Wednesday, December 18th, 2019 | | Demoted MR K. Ono to Triple A Caprica. |
| Friday, December 6th, 2019 | | Signed MR R. Miller to a 1-year contract extension worth a total of $2,000,000. | | Signed MR M. Lisbey to a 1-year contract extension worth a total of $5,500,000. |
| Sunday, December 1st, 2019 | | Traded 19-year-old catcher R. Jones and a 3rd round draft pick to the Ludington Lumberjaxxx, getting 30-year-old third baseman A. Thole in return. | | Traded 28-year-old third baseman P. Sharpe to the Oakland Muggers, getting 23-year-old starting pitcher A. Brooks, 18-year-old right fielder M. Porter and a 3rd round draft pick in return. | | Drafted MR N. Byrd in the 2019 rule 5 draft (Pick 8, Round 1, 8th overall Pick). | | Drafted MR W. Gibson in the 2019 rule 5 draft (Pick 8, Round 2, 28th overall Pick). | | Drafted MR C. Gómez in the 2019 rule 5 draft (Pick 8, Round 3, 48th overall Pick). |
| Friday, November 29th, 2019 | | CL R. Elisarraraz becomes a free-agent. | | RF A. Gutiérrez received a 1-year contract through automatic renewal worth a total of $500,000. | | MR J. Fuller received a 1-year contract through automatic renewal worth a total of $500,000. | | SP A. Granados received a 1-year contract through automatic renewal worth a total of $500,000. | | SP P. Guardado received a 1-year contract through automatic renewal worth a total of $500,000. | | SS V. Espinosa received a 1-year contract through automatic renewal worth a total of $500,000. | | LF B. O'Crean received a 1-year contract through automatic renewal worth a total of $500,000. | | C L. Torres received a 1-year contract through automatic renewal worth a total of $500,000. |
| Tuesday, November 26th, 2019 | | CF C. Marshall received a 1-year contract through arbitration worth a total of $4,750,000. | | C R. García received a 1-year contract through arbitration worth a total of $750,000. | | MR K. Ono received a 1-year contract through arbitration worth a total of $750,000. | | 3B P. Sharpe received a 1-year contract through arbitration worth a total of $6,500,000. | | CF R. Días received a 1-year contract through arbitration worth a total of $750,000. | | SS R. Moore received a 1-year contract through arbitration worth a total of $1,082,400. | | SP R. Stevens received a 1-year contract through arbitration worth a total of $3,800,000. | | MR R. Miller received a 1-year contract through arbitration worth a total of $1,700,000. | | MR C. Stollings becomes a free-agent. | | 1B L. Atkins received a 1-year contract through arbitration worth a total of $4,500,000. | | MR M. Lisbey received a 1-year contract through arbitration worth a total of $3,800,000. |
| Monday, November 25th, 2019 | | Traded 28-year-old second baseman I. Gutiérrez to the Oakland Muggers, getting 20-year-old third baseman D. Pugh and a 4th round draft pick in return. |
| Sunday, November 17th, 2019 | | Signed free agent SP P. Dimauro to a 1-year contract worth a total of $500,000. |
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