| | | Tuesday, September 17th, 2013 | | Placed 3B Arturo Monagas on the 15-day disabled list. | | Placed 2B Zach Tyler on the 15-day disabled list. |
| Sunday, September 8th, 2013 | | SP Gary Gray retires. |
| Wednesday, August 14th, 2013 | | Failed to sign 4th round draft pick Artie Riley. | | Failed to sign 10th round draft pick Jamie Denison. | | Failed to sign 14th round draft pick Jorge Guzmán. |
| Monday, July 29th, 2013 | | Placed CL Tom Smith on the 60-day disabled list. | | Placed RF Jonathan Smith on the 15-day disabled list. | | Placed RF Craig Olsen on the 15-day disabled list. |
| Saturday, June 29th, 2013 | | Signed RF Craig Olsen to a 2-year contract extension worth a total of $4,255,000. |
| Friday, June 28th, 2013 | | Signed Javier Romero to a minor league contract with a signing bonus of $1,900,000. |
| Thursday, June 27th, 2013 | | Signed Slick McCoy to a minor league contract with a signing bonus of $5,270,000. |
| Tuesday, June 25th, 2013 | | Signed Robert Harris to a minor league contract with a signing bonus of $590,000. |
| Monday, June 17th, 2013 | | Signed Dave Thomas to a minor league contract with a signing bonus of $320,000. |
| Monday, June 10th, 2013 | | Placed MR Gary Gray on the 60-day disabled list. |
| Monday, May 20th, 2013 | | SS Esteban Hernández was designated for assignment and placed on waivers. |
| Tuesday, February 12th, 2013 | | 3B Vicente Ávila was designated for assignment and placed on waivers. | | Placed SP Esteban García on the active roster. |
| Friday, February 8th, 2013 | | Placed C Leonard Carter on the active roster. |
| Saturday, February 2nd, 2013 | | Signed free agent C Leonard Carter to a 2-year contract worth a total of $6,540,000. | | Signed free agent SP Esteban García to a 3-year contract worth a total of $10,200,000. |
| Saturday, December 29th, 2012 | | Placed SP Norm Yabsley on the active roster. |
| Wednesday, December 26th, 2012 | | Signed free agent SP Norm Yabsley to a 3-year contract worth a total of $17,790,000. |
| Monday, November 19th, 2012 | | Placed 2B Zach Tyler on the active roster. | | Activated 2B Zach Tyler from the 60-day disabled list. |
| Sunday, November 18th, 2012 | | 2B Zach Tyler received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Joe Wallace received a 1-year contract through automatic renewal worth a total of $400,000. | | 3B Connor Moss received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Edward Hopkins becomes a free-agent. | | SP Carlos López received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Amalgarbha Ramprasad received a 1-year contract through automatic renewal worth a total of $400,000. | | C Bob Forbes received a 1-year contract through automatic renewal worth a total of $400,000. | | SS Tse-tung Wong received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Pierre Payette received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Eduardo Nalasco received a 1-year contract through automatic renewal worth a total of $400,000. | | RF Dave Abbott received a 1-year contract through automatic renewal worth a total of $400,000. | | 1B Nathan Downing received a 1-year contract through automatic renewal worth a total of $400,000. | | RF Jonathan Smith received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Otto Miller becomes a free-agent. | | 3B Vicente Ávila received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Willie Cross received a 1-year contract through automatic renewal worth a total of $400,000. | | CF Richard Lee received a 1-year contract through automatic renewal worth a total of $400,000. | | LF Dave Matos received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Jared Gunther received a 1-year contract through automatic renewal worth a total of $400,000. | | 2B David Christensen received a 1-year contract through automatic renewal worth a total of $400,000. | | CL Don Peterson received a 1-year contract through automatic renewal worth a total of $400,000. | | 2B Miguel Rodríguez received a 1-year contract through automatic renewal worth a total of $400,000. | | SS Enrique Reyes received a 1-year contract through automatic renewal worth a total of $400,000. |
| Thursday, November 15th, 2012 | | 3B Arturo Monagas received a 1-year contract through arbitration worth a total of $7,000,000. | | 3B Guy Allard received a 1-year contract through arbitration worth a total of $4,600,000. | | MR Daron Ward received a 1-year contract through arbitration worth a total of $600,000. | | SP Bob Adams received a 1-year contract through arbitration worth a total of $920,000. | | 1B Phil Goodenough received a 1-year contract through arbitration worth a total of $9,000,000. | | MR Chris Albert received a 1-year contract through arbitration worth a total of $600,000. | | SP Daniel Díaz becomes a free-agent. | | C Luis Martínez received a 1-year contract through arbitration worth a total of $1,407,780. | | MR Richard Saunders received a 1-year contract through arbitration worth a total of $600,000. | | C José Rivas received a 1-year contract through arbitration worth a total of $600,000. |
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