| | | Sunday, December 30th, 2012 | | Signed free agent SP Eric Phillips to a minor league contract. |
| Monday, December 17th, 2012 | | Drafted RF Seitaro Maruyama in the 2012 first-year player draft (Round 1, Pick 12, 12th overall pick). | | Drafted 1B José Jaramillo in the 2012 first-year player draft (Round 2, Pick 12, 36th overall pick). | | Drafted LF Will Bowman in the 2012 first-year player draft (Round 3, Pick 12, 60th overall pick). | | Drafted SP Yoshinobu Kondo in the 2012 first-year player draft (Round 4, Pick 12, 84th overall pick). | | Drafted SP Bruce Marshall in the 2012 first-year player draft (Round 5, Pick 12, 108th overall pick). | | Drafted SP Juan Medina in the 2012 first-year player draft (Round 6, Pick 12, 132nd overall pick). | | Drafted SP Mushanokoji Uchida in the 2012 first-year player draft (Round 7, Pick 12, 156th overall pick). | | Drafted CF Jamie Bell in the 2012 first-year player draft (Round 8, Pick 12, 180th overall pick). | | Drafted C Héctor Chávez in the 2012 first-year player draft (Round 9, Pick 12, 204th overall pick). | | Drafted SP Ed Yuke in the 2012 first-year player draft (Round 10, Pick 12, 228th overall pick). | | Drafted CF Kazuo Yamada in the 2012 first-year player draft (Round 11, Pick 12, 252nd overall pick). | | Drafted CF Jim McNayr in the 2012 first-year player draft (Round 12, Pick 12, 276th overall pick). |
| Wednesday, November 21st, 2012 | | SP Roberto Campos received a 1-year contract through automatic renewal worth a total of $510,000. | | CF Joe Herman received a 1-year contract through automatic renewal worth a total of $510,000. | | LF Dave Olson received a 1-year contract through automatic renewal worth a total of $510,000. | | MR Bartolo Nava received a 1-year contract through automatic renewal worth a total of $510,000. | | SP José Serrano received a 1-year contract through automatic renewal worth a total of $510,000. | | MR Sixto Lavio received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Travis James received a 1-year contract through automatic renewal worth a total of $510,000. | | LF Jorge Mora received a 1-year contract through automatic renewal worth a total of $510,000. | | RF Holden Adams received a 1-year contract through automatic renewal worth a total of $510,000. | | C Joe Barnes received a 1-year contract through automatic renewal worth a total of $510,000. | | LF Marvin Bowman received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Mathew Thomas becomes a free-agent. | | SP Wes Phillips becomes a free-agent. | | C Jonathan Cunningham becomes a free-agent. | | 2B Xavier Morris becomes a free-agent. | | RF Jason Scott becomes a free-agent. | | SP Ozzy Prince becomes a free-agent. | | 1B Carlos Zaragoza becomes a free-agent. | | MR Kevin Lewis becomes a free-agent. |
| Sunday, November 18th, 2012 | | SP Bob Lee received a 1-year contract through arbitration worth a total of $8,125,000. | | 2B Herman Campbell received a 1-year contract through arbitration worth a total of $1,856,000. | | 1B Dave Hutchinson received a 1-year contract through arbitration worth a total of $3,901,500. | | CF Will Dook received a 1-year contract through arbitration worth a total of $750,000. | | SS Brennan Akers received a 1-year contract through arbitration worth a total of $935,000. | | SP Norman Brown received a 1-year contract through arbitration worth a total of $750,000. | | SS Dawson Simms received a 1-year contract through arbitration worth a total of $750,000. |
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