| | | Sunday, December 30th, 2012 | | Signed free agent SP Howard Chamness to a minor league contract. | | Signed free agent SP Armando Aragón to a minor league contract. |
| Wednesday, December 26th, 2012 | | Signed free agent MR Claudio Macías to a minor league contract. |
| Sunday, December 23rd, 2012 | | Signed free agent LF Tommy Harris to a 4-year contract worth a total of $56,360,000. |
| Wednesday, December 19th, 2012 | | Signed free agent MR Jorge Aguilar to a minor league contract. | | Signed free agent MR Keith Wyatt to a minor league contract. |
| Monday, December 17th, 2012 | | Drafted 1B Lorne Hinxman in the 2012 first-year player draft (Round 1, Pick 11, 11th overall pick). | | Drafted SP Hua-ding Gui in the 2012 first-year player draft (Round 2, Pick 11, 35th overall pick). | | Drafted C Mike Morrison in the 2012 first-year player draft (Round 3, Pick 11, 59th overall pick). | | Drafted 1B Shimei Omori in the 2012 first-year player draft (Round 4, Pick 11, 83rd overall pick). | | Drafted 2B Sosa Mizuno in the 2012 first-year player draft (Round 5, Pick 11, 107th overall pick). | | Drafted 1B Russ Butler in the 2012 first-year player draft (Round 6, Pick 11, 131st overall pick). | | Drafted RF Ralph Pruitt in the 2012 first-year player draft (Round 7, Pick 11, 155th overall pick). | | Drafted LF Harold Poole in the 2012 first-year player draft (Round 8, Pick 11, 179th overall pick). | | Drafted LF Takuji Motsuzuki in the 2012 first-year player draft (Round 9, Pick 11, 203rd overall pick). | | Drafted LF Tony Rodríguez in the 2012 first-year player draft (Round 10, Pick 11, 227th overall pick). | | Drafted SP Roy Walden in the 2012 first-year player draft (Round 11, Pick 11, 251st overall pick). | | Drafted LF Andrés Martínez in the 2012 first-year player draft (Round 12, Pick 11, 275th overall pick). |
| Thursday, December 6th, 2012 | | Signed free agent 1B Jim Howell to a minor league contract. |
| Saturday, December 1st, 2012 | | Signed free agent SP Sean Miles to a minor league contract. |
| Friday, November 23rd, 2012 | | Placed LF Todd Bradshaw on irrevocable waivers. |
| Wednesday, November 21st, 2012 | | SP Manuel Ruíz received a 1-year contract through automatic renewal worth a total of $510,000. | | LF Danny Hardy received a 1-year contract through automatic renewal worth a total of $510,000. | | 2B Bill Whitehead received a 1-year contract through automatic renewal worth a total of $510,000. | | CF Eric Black received a 1-year contract through automatic renewal worth a total of $510,000. | | C Len Brewer received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Kurt Taylor received a 1-year contract through automatic renewal worth a total of $510,000. | | MR Jon Lewis received a 1-year contract through automatic renewal worth a total of $510,000. | | CF Jake Green received a 1-year contract through automatic renewal worth a total of $510,000. | | 3B Francisco Morales received a 1-year contract through automatic renewal worth a total of $510,000. | | MR Joe Russell received a 1-year contract through automatic renewal worth a total of $510,000. | | CF Daniel Rodríguez received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Bob Armstrong received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Tim Berry received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Chet Carver received a 1-year contract through automatic renewal worth a total of $510,000. |
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