| | | Friday, September 18th, 2015 | | Signed RF Vincente Rodríguez to a 4-year contract extension worth a total of $48,120,000. |
| Tuesday, September 15th, 2015 | | Placed 1B Tomás Pérez on the active roster. | | Activated 1B Tomás Pérez from the disabled list. |
| Sunday, September 6th, 2015 | | Signed MR Mark Moulds to a 2-year contract extension worth a total of $2,415,000. | | Signed SS Cirillo Maestas to a 1-year contract extension worth a total of $11,500,000. |
| Friday, June 26th, 2015 | | Signed Dave Ruthman to a minor league contract with a signing bonus of $750,000. | | SP Kyung-soo Cho was designated for assignment and placed on waivers. | | Placed SP Brody Grimes on the active roster. |
| Monday, June 22nd, 2015 | | Signed Alberto Herrera to a minor league contract with a signing bonus of $2,540,000. |
| Saturday, June 20th, 2015 | | Signed free agent SP Brody Grimes to a 1-year contract worth a total of $1,000,000. |
| Tuesday, June 9th, 2015 | | Placed MR Mark Moulds on the 15-day disabled list. |
| Tuesday, June 2nd, 2015 | | MR Hi-sang Yop was designated for assignment and placed on waivers. | | Placed MR Dan Fleming on the active roster. | | Activated MR Dan Fleming from the disabled list. |
| Tuesday, May 19th, 2015 | | Placed MR Dan Fleming on the 15-day disabled list. |
| Monday, March 9th, 2015 | | Placed 2B António Rivera on the 15-day disabled list. |
| Monday, February 9th, 2015 | | CL Yeow-whye Fong was designated for assignment and placed on waivers. | | Placed 2B António Rivera on the active roster. | | C Tony Escobar was designated for assignment and placed on waivers. | | Placed 3B Todd Murphy on the active roster. |
| Saturday, January 31st, 2015 | | Signed free agent 2B António Rivera to a 1-year contract worth a total of $7,500,000. | | Signed free agent 3B Todd Murphy to a 2-year contract worth a total of $14,000,000. |
| Monday, December 22nd, 2014 | | LF Gustavo Ortega was designated for assignment and placed on waivers. | | Placed SP Martin Turner on the active roster. | | Activated SP Martin Turner from the 60-day disabled list. |
| Monday, December 15th, 2014 | | C Francisco López was designated for assignment and placed on waivers. | | Placed 1B Tomás Pérez on the active roster. |
| Sunday, December 14th, 2014 | | Signed free agent 1B Tomás Pérez to a 1-year contract worth a total of $880,000. |
| Sunday, December 7th, 2014 | | Signed free agent SP Jack Wright to a 2-year contract worth a total of $3,840,000. |
| Sunday, November 30th, 2014 | | Signed free agent MR Dan Fleming to a 2-year contract worth a total of $1,440,000. |
| Saturday, November 29th, 2014 | | Signed free agent MR Richard Saunders to a 2-year contract worth a total of $1,320,000. |
| Tuesday, November 18th, 2014 | | SP Billy Bailey received a 1-year contract through automatic renewal worth a total of $400,000. | | CF Francisco Zúńiga received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Karol van den Berg received a 1-year contract through automatic renewal worth a total of $400,000. | | C Pedro Chira received a 1-year contract through automatic renewal worth a total of $400,000. | | SS Juan López received a 1-year contract through automatic renewal worth a total of $400,000. | | 3B Rick Maunsell received a 1-year contract through automatic renewal worth a total of $400,000. | | CF Vincent Wood received a 1-year contract through automatic renewal worth a total of $400,000. | | CL Nick Roy received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Cletus Albert received a 1-year contract through automatic renewal worth a total of $400,000. | | 1B Rodrigo López received a 1-year contract through automatic renewal worth a total of $400,000. | | LF Gerald Martin received a 1-year contract through automatic renewal worth a total of $400,000. | | 1B Ray Lawson becomes a free-agent. | | MR Ignacio Rey received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Brendan Campbell received a 1-year contract through automatic renewal worth a total of $400,000. |
| Saturday, November 15th, 2014 | | C Dominic Thompson received a 1-year contract through arbitration worth a total of $600,000. | | 3B Alonso López becomes a free-agent. | | SS Cirillo Maestas received a 1-year contract through arbitration worth a total of $7,500,000. | | 2B Matthew Sanders received a 1-year contract through arbitration worth a total of $800,000. | | 2B Kevin Rohan received a 1-year contract through arbitration worth a total of $600,000. | | SP Martin Turner received a 1-year contract through arbitration worth a total of $948,000. | | LF Laurent Dauphinais becomes a free-agent. | | MR Stephen Brown received a 1-year contract through arbitration worth a total of $630,000. | | RF Vincente Rodríguez received a 1-year contract through arbitration worth a total of $5,500,000. | | SP Andy Francis received a 1-year contract through arbitration worth a total of $4,000,000. |
| Tuesday, November 11th, 2014 | | SP Jim Mooney was designated for assignment and placed on waivers. | | Placed MR Karol van den Berg on the active roster. |
| Sunday, November 2nd, 2014 | | Signed MR Jim Green to a 3-year contract extension worth a total of $2,850,000. |
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