| | | | | | | | | | |  | Major Transactions |
| | | | Monday, September 3rd, 2018 | | Signed SP D. Durand to a 4-year contract extension worth a total of $56,700,000. |
| Monday, July 30th, 2018 | | SP F. Lakey was designated for assignment and placed on waivers. | | Purchased the contract of SP F. Jones from Triple A Kensington. | | MR R. McKay was designated for assignment and placed on waivers. | | Purchased the contract of MR A. Cerda from Triple A Kensington. |
| Wednesday, May 16th, 2018 | | Placed 3B B. Stinson on the 15-day disabled list. | | Placed CF J. Bevers on the active roster. | | Activated CF J. Bevers from the disabled list. | | Placed CF G. Rico on irrevocable waivers. | | Designated CF G. Rico for assignment. | | Purchased the contract of SS V. Murillo from Triple A Kensington. |
| Wednesday, January 3rd, 2018 | | Signed team doctor E. Godfrey to a 5-year, $340,000 per year contract. |
| Friday, December 1st, 2017 | | Drafted MR N. Simeon in the 2017 rule 5 draft (Pick 6, Round 1, 6th overall Pick). |
| Friday, November 24th, 2017 | | Signed free agent SP A. Rueter to a 5-year contract worth a total of $61,000,000. |
| Thursday, November 2nd, 2017 | | SP J. Okane becomes a free-agent. | | 3B B. Parker becomes a free-agent. | | MR G. Wafford received a 1-year contract through automatic renewal worth a total of $300,000. | | LF J. Amezcua received a 1-year contract through automatic renewal worth a total of $300,000. | | 1B L. George received a 1-year contract through automatic renewal worth a total of $300,000. | | MR D. Allen received a 1-year contract through automatic renewal worth a total of $300,000. | | MR J. Curl received a 1-year contract through automatic renewal worth a total of $300,000. | | MR R. McKay received a 1-year contract through automatic renewal worth a total of $300,000. | | SS V. Murillo received a 1-year contract through automatic renewal worth a total of $300,000. | | MR J. Guerrera received a 1-year contract through automatic renewal worth a total of $300,000. | | CF A. Marquez received a 1-year contract through automatic renewal worth a total of $300,000. | | C N. Gracia received a 1-year contract through automatic renewal worth a total of $300,000. | | 3B B. Stinson received a 1-year contract through automatic renewal worth a total of $300,000. | | 2B J. Banks becomes a free-agent. | | C M. Woolsey becomes a free-agent. | | SP R. Vaz becomes a free-agent. |
| Monday, October 30th, 2017 | | Traded 23-year old reliever R. Riddick to the Seattle Monarchs, getting 24-year old minor league shortstop L. Cedeņo, 21-year old minor league right fielder R. Washington and $2,000,000 in cash in return. | | Demoted SS L. Cedeņo to Triple A Kensington. | | SP T. Albarado received a 1-year contract through arbitration worth a total of $1,827,840. | | CL L. Sweeney received a 1-year contract through arbitration worth a total of $1,922,400. | | RF J. Jacobs received a 1-year contract through arbitration worth a total of $1,267,392. | | SP N. Coghlan received a 1-year contract through arbitration worth a total of $2,472,960. | | MR I. Webber received a 1-year contract through arbitration worth a total of $3,363,400. | | LF C. Bondy received a 1-year contract through arbitration worth a total of $5,280,000. | | 2B A. Fetty received a 1-year contract through arbitration worth a total of $317,400. | | SP D. Durand received a 1-year contract through arbitration worth a total of $3,708,000. | | SS R. Chambers received a 1-year contract through arbitration worth a total of $541,440. | | MR V. Cipriani received a 1-year contract through arbitration worth a total of $1,131,600. | | MR X. Portillo received a 1-year contract through arbitration worth a total of $1,036,800. |
| Friday, October 13th, 2017 | | Signed scouting director M. Martin to a 1-year, $220,000 per year contract. |
| Tuesday, October 10th, 2017 | | DO John Ashford retires. | | Scouting Director M. Marshall leaves the team, his contract was not renewed. | | Voided the team option year of SP R. Vaz. | | Voided the team option year of SP J. Okane. |
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