| | | Sunday, December 30th, 2012 | | Signed free agent 2B Qing-nian Shi to a 1-year contract worth a total of $1,450,000. |
| Monday, December 17th, 2012 | | Drafted 3B Martin Hayden in the 2012 first-year player draft (Round 1, Pick 14, 14th overall pick). | | Drafted SP Toyotomi Nakano in the 2012 first-year player draft (Round 2, Pick 14, 38th overall pick). | | Drafted 2B Jim Dwyer in the 2012 first-year player draft (Round 3, Pick 14, 62nd overall pick). | | Drafted SP Stéphane Rousseau in the 2012 first-year player draft (Round 4, Pick 14, 86th overall pick). | | Drafted CF Leslie Perfect in the 2012 first-year player draft (Round 5, Pick 14, 110th overall pick). | | Drafted SP Bill Newton in the 2012 first-year player draft (Round 6, Pick 14, 134th overall pick). | | Drafted CF Terry Boyle in the 2012 first-year player draft (Round 7, Pick 14, 158th overall pick). | | Drafted CF Gwenael Rodriguez in the 2012 first-year player draft (Round 8, Pick 14, 182nd overall pick). | | Drafted CF Neil Fullerton in the 2012 first-year player draft (Round 9, Pick 14, 206th overall pick). | | Drafted CF Masakado Hirano in the 2012 first-year player draft (Round 10, Pick 14, 230th overall pick). | | Drafted 1B Shawn Dennis in the 2012 first-year player draft (Round 11, Pick 14, 254th overall pick). | | Drafted SP Hideki Sakaguchi in the 2012 first-year player draft (Round 12, Pick 14, 278th overall pick). |
| Wednesday, November 21st, 2012 | | RF Lorenzo Rodríguez received a 1-year contract through automatic renewal worth a total of $510,000. | | 3B Javier García received a 1-year contract through automatic renewal worth a total of $510,000. | | RF Stu Barnes received a 1-year contract through automatic renewal worth a total of $510,000. | | C Joe Cote received a 1-year contract through automatic renewal worth a total of $510,000. | | C Michael Frost received a 1-year contract through automatic renewal worth a total of $510,000. | | C Pedro Gonzáles received a 1-year contract through automatic renewal worth a total of $500,000. | | SS Jeffrey Coffman received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Adrián Carne received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Nelson Ingram received a 1-year contract through automatic renewal worth a total of $510,000. | | 1B Brooks Davis received a 1-year contract through automatic renewal worth a total of $510,000. | | 2B Ki-moon Pak received a 1-year contract through automatic renewal worth a total of $510,000. | | MR Mike Arnold received a 1-year contract through automatic renewal worth a total of $510,000. | | SS Rafael Romero received a 1-year contract through automatic renewal worth a total of $500,000. | | 3B Rubén Ruíz received a 1-year contract through automatic renewal worth a total of $510,000. | | CL Del Hubble becomes a free-agent. | | SP Sabutai Aravidze received a 1-year contract through automatic renewal worth a total of $500,000. | | SP Miguel Alvarado received a 1-year contract through automatic renewal worth a total of $500,000. | | SP Michael Bryan received a 1-year contract through automatic renewal worth a total of $510,000. | | CF Clarence Wauchope received a 1-year contract through automatic renewal worth a total of $510,000. | | 2B Woody Matthews received a 1-year contract through automatic renewal worth a total of $510,000. | | SS Jorge García received a 1-year contract through automatic renewal worth a total of $510,000. | | MR Bob Graybill becomes a free-agent. | | MR David Burns becomes a free-agent. | | 3B John Welch becomes a free-agent. |
| Sunday, November 18th, 2012 | | MR Darryl Bradshaw received a 1-year contract through arbitration worth a total of $3,600,000. | | MR Chase Burke received a 1-year contract through arbitration worth a total of $1,400,000. | | CL Manuel Marroquín received a 1-year contract through arbitration worth a total of $750,000. | | CF Tommy Shaffer received a 1-year contract through arbitration worth a total of $750,000. | | CF Héctor Ramírez received a 1-year contract through arbitration worth a total of $6,036,250. |
| Wednesday, November 7th, 2012 | | Signed RF Pat Day to a 2-year contract extension worth a total of $2,720,000. |
| Tuesday, November 6th, 2012 | | Signed hitting coach Ken Boyd to a 3-year, $150,000 per year contract. |
| Monday, November 5th, 2012 | | Signed pitching coach Víctor Guerro to a 3-year, $160,000 per year contract. |
| Sunday, October 28th, 2012 | | Pitching Coach António Pacheco leaves the team, his contract was not renewed. | | Hitting Coach Soetsu Yamashita leaves the team, his contract was not renewed. |
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