| | | Friday, December 28th, 2012 | | Signed Julián Arteago to a minor league contract with a signing bonus of $700,000. |
| Monday, December 24th, 2012 | | Signed Dean Graham to a minor league contract with a signing bonus of $400,000. |
| Sunday, December 23rd, 2012 | | Signed Li-chi Au to a minor league contract with a signing bonus of $600,000. |
| Monday, December 17th, 2012 | | Drafted SP Julián Arteago in the 2012 first-year player draft (Round 1, Pick 21, 21st overall pick). | | Drafted RF Li-chi Au in the 2012 first-year player draft (Round 2, Pick 21, 45th overall pick). | | Drafted 3B Dean Graham in the 2012 first-year player draft (Round 3, Pick 21, 69th overall pick). | | Drafted 3B Ricardo Ramírez in the 2012 first-year player draft (Round 4, Pick 21, 93rd overall pick). | | Drafted LF Yoshinaka Tanaka in the 2012 first-year player draft (Round 5, Pick 21, 117th overall pick). | | Drafted CF Steve Vallis in the 2012 first-year player draft (Round 6, Pick 21, 141st overall pick). | | Drafted 3B Kazunari Murata in the 2012 first-year player draft (Round 7, Pick 21, 165th overall pick). | | Drafted LF Tetsui Okamoto in the 2012 first-year player draft (Round 8, Pick 21, 189th overall pick). | | Drafted SP John Kilmartin in the 2012 first-year player draft (Round 9, Pick 21, 213rd overall pick). | | Drafted LF Robun Suzuki in the 2012 first-year player draft (Round 10, Pick 21, 237th overall pick). | | Drafted 2B Yoshihide Hashimoto in the 2012 first-year player draft (Round 11, Pick 21, 261st overall pick). | | Drafted C Philippe Rossi in the 2012 first-year player draft (Round 12, Pick 21, 285th overall pick). |
| Friday, November 23rd, 2012 | | Placed CL Jim Simmons on the 40-man roster. | | Placed SP David Martin on the Double A 14-day disabled list, retroactive to 09/06/2012. | | Placed SS David Wallace on the Double A 14-day disabled list, retroactive to 08/16/2012. |
| Wednesday, November 21st, 2012 | | SP Austin Brown received a 1-year contract through automatic renewal worth a total of $510,000. | | C Tim Shields received a 1-year contract through automatic renewal worth a total of $510,000. | | 2B Stanislav Izyurov received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Daron Brown received a 1-year contract through automatic renewal worth a total of $510,000. | | 3B Millard Shafer received a 1-year contract through automatic renewal worth a total of $510,000. | | MR Martín Torres received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Anthony Peoples received a 1-year contract through automatic renewal worth a total of $510,000. | | C Gene O'Reilly received a 1-year contract through automatic renewal worth a total of $510,000. | | MR Ray Brady received a 1-year contract through automatic renewal worth a total of $500,000. | | CF Greg Forrest received a 1-year contract through automatic renewal worth a total of $510,000. | | MR Cris Torres becomes a free-agent. |
| Sunday, November 18th, 2012 | | LF Tom Becker received a 1-year contract through arbitration worth a total of $10,562,500. | | SS Paco Fernández received a 1-year contract through arbitration worth a total of $750,000. | | LF Frank Moyer received a 1-year contract through arbitration worth a total of $1,000,000. | | MR Allen Marshall received a 1-year contract through arbitration worth a total of $750,000. | | SP Lou Smith received a 1-year contract through arbitration worth a total of $750,000. | | 1B António Paz becomes a free-agent. | | 2B Joe Snow becomes a free-agent. |
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