| | | Tuesday, October 22nd, 2013 | | Signed manager Rikiya Samurakami to a 3-year, $160,000 per year contract. |
| Wednesday, October 16th, 2013 | | MR Tom Green was designated for assignment and placed on waivers. | | Fired manager Blair Fritz. |
| Monday, June 17th, 2013 | | Purchased the contract of LF Ken Wade from Triple A Antioch. |
| Monday, June 10th, 2013 | | SS Ichizo Hirose was designated for assignment and placed on waivers. |
| Friday, May 17th, 2013 | | Signed SP Brian Hudson to a 3-year contract extension worth a total of $7,500,000. |
| Saturday, February 23rd, 2013 | | Signed free agent 1B Dave Proctor to a 1-year contract worth a total of $1,500,000. |
| Wednesday, January 23rd, 2013 | | Signed 4th round draft pick Ichizo Hirose for a signing bonus of $2,500,000 and a 1-year major league contract worth a total of $500,000. |
| Tuesday, January 22nd, 2013 | | Signed 5th round draft pick Izo Kichikawa for a signing bonus of $1,500,000 and a 1-year major league contract worth a total of $500,000. |
| Thursday, January 17th, 2013 | | Signed 2nd round draft pick Chris Weir for a signing bonus of $4,000,000 and a 1-year major league contract worth a total of $500,000. |
| Wednesday, January 16th, 2013 | | Signed 3rd round draft pick Tetsui Jouon for a signing bonus of $4,000,000 and a 1-year major league contract worth a total of $500,000. |
| Tuesday, January 1st, 2013 | | SP Chris Johnson was designated for assignment and placed on waivers. | | SP Alejandro Cabrera was designated for assignment and placed on waivers. | | CF Ray Walton was designated for assignment and placed on waivers. |
| Sunday, December 30th, 2012 | | Signed free agent SP Tom Green to a 1-year contract worth a total of $900,000. |
| Saturday, December 22nd, 2012 | | Signed Adrien Clément to a minor league contract with a signing bonus of $1,000,000. |
| Monday, December 10th, 2012 | | Signed free agent SP Alejandro Cabrera to a 2-year contract worth a total of $2,000,000. |
| Thursday, December 6th, 2012 | | Signed free agent SP Joe Erickson to a 2-year contract worth a total of $1,800,000. |
| Saturday, December 1st, 2012 | | Drafted SP Conor Nodder in the 2012 Rule 5 Draft (Round 1, Pick 13, 13th overall Pick), from the Las Vegas Jokers. |
| Wednesday, November 21st, 2012 | | LF Tom Klein received a 1-year contract through automatic renewal worth a total of $6,000,000. | | MR Dennis Inman received a 1-year contract through automatic renewal worth a total of $510,000. | | CL Ramón Rivera received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Eric Yates received a 1-year contract through automatic renewal worth a total of $510,000. | | SS Francisco Ángel received a 1-year contract through automatic renewal worth a total of $510,000. | | SS José Piña received a 1-year contract through automatic renewal worth a total of $510,000. | | CF Austin McCabe received a 1-year contract through automatic renewal worth a total of $500,000. | | SP Sancho Arteaga received a 1-year contract through automatic renewal worth a total of $500,000. | | 2B Ignacio Villarreal received a 1-year contract through automatic renewal worth a total of $510,000. | | RF John Ross received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Héctor Figueroa received a 1-year contract through automatic renewal worth a total of $510,000. | | MR Ramón García received a 1-year contract through automatic renewal worth a total of $510,000. |
| Sunday, November 18th, 2012 | | SP Brian O'Keggan received a 1-year contract through arbitration worth a total of $750,000. |
| Thursday, November 1st, 2012 | | Signed MR Pedro Rey to a 4-year contract extension worth a total of $7,250,000. | | Signed 3B Valentín Cabrera to a 3-year contract extension worth a total of $3,200,000. | | Signed CF Mare Punahele to a 3-year contract extension worth a total of $2,850,000. |
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