| | | Saturday, May 1st, 2021 | | Signed SP Víctor Rodríguez to a 3-year contract extension worth a total of $5,400,000. |
| Monday, April 26th, 2021 | | Traded 26-year-old first baseman Pedro Pacheco to the Houston Apollos, getting 29-year-old first baseman Jason Conley, 17-year-old minor league left fielder Fred Turner, a 2nd round draft pick, a 3rd round draft pick and $3,000,000 in cash in return. | | Placed 1B Jason Conley on the active roster. |
| Monday, April 19th, 2021 | | 3B Daniel Morán was designated for assignment and placed on waivers. | | SS Javier Paredes was designated for assignment and placed on waivers. | | Purchased the contract of 1B Júlio Rencurel from Triple A Peoria. | | Traded 24-year-old reliever Ray Childs to the New York Gothams, getting 17-year-old minor league reliever Manny Hunt, 22-year-old minor league third baseman Jack Bryant and a 2nd round draft pick in return. | | Traded 28-year-old reliever Orlando Maldonado to the Alaska Freeze, getting 21-year-old minor league catcher Alfonso Casas in return. | | Traded 26-year-old third baseman Daniel Morán to the Los Angeles Natives, getting 24-year-old minor league shortstop Kenny Baumgartner, 21-year-old starting pitcher Chandler Morgan, 18-year-old minor league first baseman José Ortíz and 19-year-old minor league closer Mark Taylor in return. | | Traded 27-year-old shortstop Javier Paredes to the Los Angeles Natives, getting 18-year-old minor league starting pitcher Ivan Mansfield, a 1st round draft pick and a 2nd round draft pick in return. | | Placed SS Kenny Baumgartner on the active roster. |
| Wednesday, November 25th, 2020 | | MR Chris Short becomes a free-agent. | | CL Tristan Wright received a 1-year contract through automatic renewal worth a total of $400,000. | | LF Edgardo Aquino received a 1-year contract through automatic renewal worth a total of $400,000. | | MR César Manuel received a 1-year contract through automatic renewal worth a total of $400,000. | | 1B Pedro Pacheco received a 1-year contract through automatic renewal worth a total of $400,000. | | C Clark Bowers becomes a free-agent. | | CF Alonso Rowe becomes a free-agent. | | 1B Sam Francis received a 1-year contract through automatic renewal worth a total of $400,000. |
| Sunday, November 22nd, 2020 | | MR Juan Valle received a 1-year contract through arbitration worth a total of $1,500,000. | | MR Ray Childs received a 1-year contract through arbitration worth a total of $600,000. | | MR Michael Austin received a 1-year contract through arbitration worth a total of $875,000. | | SP Víctor Rodríguez received a 1-year contract through arbitration worth a total of $1,700,000. | | MR Kozue Nakamura becomes a free-agent. | | 1B Michizane Kichida received a 1-year contract through arbitration worth a total of $3,710,000. | | SS Javier Paredes received a 1-year contract through arbitration worth a total of $9,000,000. | | 3B Daniel Morán received a 1-year contract through arbitration worth a total of $10,000,000. |
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