| | | Tuesday, September 10th, 2013 | | Activated 3B Sam Stanley from the disabled list. |
| Friday, August 2nd, 2013 | | Placed SP Oliver Noriega on the active roster. |
| Monday, July 8th, 2013 | | Recalled RF James Lee from Triple A Akron. | | CF Toshiro Ishihara was designated for assignment and placed on irrevocable waivers. |
| Friday, July 5th, 2013 | | Signed Ricardo Martínez to a minor league contract with a signing bonus of $180,000. |
| Sunday, June 30th, 2013 | | Signed Ronald Hunt to a minor league contract with a signing bonus of $200,000. |
| Friday, June 28th, 2013 | | Signed Jun'ichi Kobayashi to a minor league contract with a signing bonus of $6,390,000. |
| Thursday, June 27th, 2013 | | Signed Jeff Penn to a minor league contract with a signing bonus of $270,000. |
| Wednesday, June 26th, 2013 | | Signed Clyde Frank to a minor league contract with a signing bonus of $320,000. | | Signed Bob White to a minor league contract with a signing bonus of $240,000. |
| Friday, June 21st, 2013 | | Signed Raúl López to a minor league contract with a signing bonus of $580,000. |
| Tuesday, May 7th, 2013 | | Placed RF Vincente Orozco on the 15-day disabled list. |
| Monday, April 22nd, 2013 | | Placed 2B Pedro Aragón on the 15-day disabled list. |
| Monday, April 8th, 2013 | | Placed SS Brian Williams on the 60-day disabled list. |
| Saturday, March 16th, 2013 | | Activated MR Anthony Werner from the 60-day disabled list. | | C Gary MacDonald was designated for assignment, placed on waivers and taken off the 40-man roster. |
| Saturday, March 2nd, 2013 | | Purchased the contract of MR Rafael DÃaz from Triple A Akron. |
| Friday, February 15th, 2013 | | 2B Nick Howell was designated for assignment and placed on waivers. | | Placed CL Zak Fisher on the active roster. |
| Tuesday, February 5th, 2013 | | Signed free agent CL Zak Fisher to a 2-year contract worth a total of $8,510,000. |
| Monday, January 28th, 2013 | | MR Dan Thompson was designated for assignment and placed on irrevocable waivers. |
| Saturday, January 26th, 2013 | | Signed free agent SP Jeremy Méndez to a 1-year contract worth a total of $650,000. |
| Saturday, December 22nd, 2012 | | Placed MR Juan Villegas on the active roster. |
| Thursday, December 20th, 2012 | | Signed free agent MR Juan Villegas to a 1-year contract worth a total of $1,920,000. |
| Saturday, December 15th, 2012 | | Placed C Carlos Campos on the active roster. |
| Thursday, December 13th, 2012 | | Signed free agent C Carlos Campos to a 3-year contract worth a total of $10,500,000. |
| Saturday, December 8th, 2012 | | Signed free agent 3B Sam Stanley to a 3-year contract worth a total of $14,310,000. | | Placed 2B Pedro Aragón on the active roster. | | Placed 3B Sam Stanley on the active roster. | | Activated RF Vincente Orozco from the 60-day disabled list. |
| Sunday, December 2nd, 2012 | | Signed free agent 2B Pedro Aragón to a 2-year contract worth a total of $3,070,000. |
| Tuesday, November 20th, 2012 | | Signed Scouting Director Robert Richards to a 4-year contract extension. |
| Sunday, November 18th, 2012 | | C Manuel Torres received a 1-year contract through automatic renewal worth a total of $400,000. | | CL Carlos Mata received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Esteban GarcÃa received a 1-year contract through automatic renewal worth a total of $400,000. | | SS Joe Butler received a 1-year contract through automatic renewal worth a total of $400,000. | | RF James Lee received a 1-year contract through automatic renewal worth a total of $400,000. | | CF Gonzalo Reyes received a 1-year contract through automatic renewal worth a total of $400,000. | | CL Ãlex Betacourt received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Vicente González received a 1-year contract through automatic renewal worth a total of $400,000. | | RF Bill McDaniel received a 1-year contract through automatic renewal worth a total of $400,000. | | RF Jason Fisher received a 1-year contract through automatic renewal worth a total of $400,000. | | 2B Nick Howell received a 1-year contract through automatic renewal worth a total of $400,000. | | SS Joshua Atley becomes a free-agent. | | 2B Gilberto Aguilar received a 1-year contract through automatic renewal worth a total of $400,000. | | RF Alfonso De Jesús received a 1-year contract through automatic renewal worth a total of $400,000. | | C Gary MacDonald received a 1-year contract through automatic renewal worth a total of $400,000. | | 2B José Trejo received a 1-year contract through automatic renewal worth a total of $750,000. |
| Thursday, November 15th, 2012 | | MR Dan Thompson received a 1-year contract through arbitration worth a total of $800,000. | | MR Roberto Camacho received a 1-year contract through arbitration worth a total of $600,000. | | MR Morton Hennessey received a 1-year contract through arbitration worth a total of $600,000. | | CF Toshiro Ishihara received a 1-year contract through arbitration worth a total of $600,000. | | 1B Anthony Kidd received a 1-year contract through arbitration worth a total of $600,000. | | CL Dan Dodson received a 1-year contract through arbitration worth a total of $858,000. | | SP Victor Morris received a 1-year contract through arbitration worth a total of $2,749,500. | | CF Joe Boyce received a 1-year contract through arbitration worth a total of $600,000. | | RF Vincente Orozco received a 1-year contract through arbitration worth a total of $5,500,000. |
| Thursday, October 25th, 2012 | | MR Rafael DÃaz has executed his last optional contract year. |
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