| | | Thursday, December 20th, 2012 | | Signed Chet Boyd to a minor league contract with a signing bonus of $950,000. |
| Monday, December 17th, 2012 | | Signed free agent CF Mende Leal to a minor league contract. | | Drafted SP Kazuhiko Kanno in the 2012 first-year player draft (Round 1, Pick 9, 9th overall pick). | | Drafted SP Chet Boyd in the 2012 first-year player draft (Round 2, Pick 9, 33rd overall pick). | | Drafted SP Guillermo Herrera in the 2012 first-year player draft (Round 3, Pick 9, 57th overall pick). | | Drafted CL Millard Moore in the 2012 first-year player draft (Round 4, Pick 9, 81st overall pick). | | Drafted SP Jonathan Knight in the 2012 first-year player draft (Round 5, Pick 9, 105th overall pick). | | Drafted SP Pedro Hernández in the 2012 first-year player draft (Round 6, Pick 9, 129th overall pick). | | Drafted RF Patrice Delhaye in the 2012 first-year player draft (Round 7, Pick 9, 153rd overall pick). | | Drafted CF Hubert Munoz in the 2012 first-year player draft (Round 8, Pick 9, 177th overall pick). | | Drafted C Takaaki Hirayama in the 2012 first-year player draft (Round 9, Pick 9, 201st overall pick). | | Drafted 1B John Holloway in the 2012 first-year player draft (Round 10, Pick 9, 225th overall pick). | | Drafted SS Tetsu Nishimura in the 2012 first-year player draft (Round 11, Pick 9, 249th overall pick). | | Drafted 2B Floyd Peterson in the 2012 first-year player draft (Round 12, Pick 9, 273rd overall pick). |
| Friday, December 7th, 2012 | | Signed free agent RF Héctor Zamora to a minor league contract. |
| Wednesday, November 21st, 2012 | | 2B Armando Rodríguez received a 1-year contract through automatic renewal worth a total of $3,800,000. | | SS Stephen Everett received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Rodney Armstrong received a 1-year contract through automatic renewal worth a total of $510,000. | | C Freddy Castillo received a 1-year contract through automatic renewal worth a total of $510,000. | | RF Jorge Rivera received a 1-year contract through automatic renewal worth a total of $500,000. | | SP Scott McGuicken becomes a free-agent. | | LF Lawrence Fox received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Robert Cates received a 1-year contract through automatic renewal worth a total of $510,000. | | CL António González received a 1-year contract through automatic renewal worth a total of $510,000. | | CL António Rodríguez received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Ray Clay received a 1-year contract through automatic renewal worth a total of $500,000. | | SP Fabrizio Palgani received a 1-year contract through automatic renewal worth a total of $510,000. | | SS Johnny Hudson received a 1-year contract through automatic renewal worth a total of $510,000. | | SS Howard Lawrence received a 1-year contract through automatic renewal worth a total of $510,000. | | 1B Jesús Cruz received a 1-year contract through automatic renewal worth a total of $500,000. | | CL Jorge Magana received a 1-year contract through automatic renewal worth a total of $500,000. | | SP José Ramírez received a 1-year contract through automatic renewal worth a total of $510,000. | | 3B Lucas Smith received a 1-year contract through automatic renewal worth a total of $500,000. | | SP Rafael Vega received a 1-year contract through automatic renewal worth a total of $500,000. | | CL Jim Davis received a 1-year contract through automatic renewal worth a total of $510,000. | | LF Jonathan Strobel received a 1-year contract through automatic renewal worth a total of $510,000. | | Designated RF Dave Stroud for assignment. | | 2B Oscar Whitney becomes a free-agent. | | 3B Pat Earnshaw becomes a free-agent. | | 2B Jessy Mendes becomes a free-agent. | | 1B Anthony Reese becomes a free-agent. | | RF Dan Townsend becomes a free-agent. |
| Sunday, November 18th, 2012 | | SP Zach Tate received a 1-year contract through arbitration worth a total of $750,000. |
| Sunday, November 4th, 2012 | | Signed DH Scott Walters to a 1-year contract extension worth a total of $750,000. |
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