| | | | | | | | | | |  | Major Transactions |
| | | | Sunday, July 1st, 2018 | | Placed CF G. Fournier on the 15-day disabled list. | | Purchased the contract of RF F. Aldape from Triple A Dayton. |
| Sunday, June 17th, 2018 | | Signed pitching coach P. Urbina to a 5-year, $610,000 per year contract. |
| Monday, March 5th, 2018 | | Placed RF P. Valdes on the 15-day disabled list. |
| Saturday, February 10th, 2018 | | Signed free agent SP J. Shuttleworth to a 1-year contract worth a total of $7,300,000. |
| Monday, February 5th, 2018 | | Placed C W. Guzman on the active roster. | | Placed RF D. Kerry on the active roster. |
| Wednesday, January 31st, 2018 | | Signed free agent RF D. Kerry to a 3-year contract worth a total of $76,530,000. | | Signed free agent C W. Guzman to a 1-year contract worth a total of $970,000. |
| Tuesday, January 16th, 2018 | | Signed Scouting Director F. González to a 5-year contract extension. |
| Monday, January 1st, 2018 | | Signed free agent CF E. Boothe to a 1-year contract worth a total of $500,000. | | Placed CF E. Boothe on the active roster. |
| Monday, December 11th, 2017 | | Placed MR H. Beeks on the active roster. |
| Saturday, December 9th, 2017 | | Signed free agent MR H. Beeks to a 3-year contract worth a total of $24,900,000. |
| Monday, December 4th, 2017 | | Placed MR D. Roberts on the active roster. |
| Saturday, December 2nd, 2017 | | Signed free agent MR D. Roberts to a 2-year contract worth a total of $8,600,000. |
| Thursday, November 2nd, 2017 | | 2B K. Lea received a 1-year contract through automatic renewal worth a total of $300,000. | | MR D. Roberts becomes a free-agent. | | MR W. Brown becomes a free-agent. | | C T. Geter becomes a free-agent. | | CF G. Fournier received a 1-year contract through automatic renewal worth a total of $300,000. | | C L. Bell received a 1-year contract through automatic renewal worth a total of $300,000. | | 3B B. Moroney received a 1-year contract through automatic renewal worth a total of $300,000. | | 1B T. Sparrow received a 1-year contract through automatic renewal worth a total of $300,000. | | MR S. Loman received a 1-year contract through automatic renewal worth a total of $300,000. | | 1B L. Walker received a 1-year contract through automatic renewal worth a total of $300,000. | | SP E. Scull becomes a free-agent. | | CF A. Suarez becomes a free-agent. |
| Monday, October 30th, 2017 | | CF G. Vidal received a 1-year contract through arbitration worth a total of $310,500. | | MR R. Brown received a 1-year contract through arbitration worth a total of $1,731,900. | | MR J. Fullen received a 1-year contract through arbitration worth a total of $1,683,600. | | SP D. Andrews received a 1-year contract through arbitration worth a total of $1,298,304. | | 2B M. Cardoza received a 1-year contract through arbitration worth a total of $1,840,000. | | MR D. Coppock received a 1-year contract through arbitration worth a total of $1,641,600. | | SP G. Smith received a 1-year contract through arbitration worth a total of $2,636,800. | | MR T. Errico received a 1-year contract through arbitration worth a total of $943,920. |
| Friday, October 13th, 2017 | | Signed manager R. Mora to a 4-year, $610,000 per year contract. |
| Tuesday, October 10th, 2017 | | SP C. Nelligan has executed his last optional contract year. | | SP C. Nelligan retires. | | MA Manuel Rivera retires. | | Voided the team option year of SP E. Scull. |
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