| | | | | | | | | | |  | Major Transactions |
| | | | Tuesday, October 9th, 2018 | | Signed free agent CL T. Vallejo to a 2-year contract worth a total of $5,070,000. |
| Monday, October 8th, 2018 | | Signed free agent MR E. Thomas to a 2-year contract worth a total of $2,270,000. | | Signed free agent SP P. Marez to a 1-year contract worth a total of $5,030,000. | | Signed free agent SP E. Gerth to a 1-year contract worth a total of $3,580,000. | | Placed MR E. Thomas on the active roster. | | Demoted SP E. Gerth to Triple A Pukalani. |
| Saturday, October 6th, 2018 | | Signed RF J. Custard to a 1-year contract extension worth a total of $1,160,000. |
| Thursday, October 4th, 2018 | | Signed free agent SP E. Gerth to a 1-year contract worth a total of $3,580,000. |
| Monday, October 1st, 2018 | | Signed free agent SP P. Marez to a 2-year contract worth a total of $2,760,000. |
| Sunday, September 16th, 2018 | | Placed RF R. Amos on the active roster. | | Activated RF R. Amos from the disabled list. |
| Monday, September 3rd, 2018 | | RF J. Reeve was claimed off waivers by Seattle. |
| Thursday, August 16th, 2018 | | Placed RF R. Amos on the 15-day disabled list. | | Purchased the contract of CF R. Legette from Triple A Pukalani. | | RF J. Reeve was designated for assignment and placed on waivers. | | Purchased the contract of LF A. Fernandez from Triple A Pukalani. |
| Saturday, June 2nd, 2018 | | Signed hitting coach D. Bader to a 5-year, $650,000 per year contract. |
| Sunday, May 6th, 2018 | | Signed SP K. Fike to a 4-year contract extension worth a total of $52,430,000. |
| Tuesday, February 13th, 2018 | | Signed Manager P. Acevedo to a 5-year contract extension. | | Signed Pitching Coach L. Lópes to a 4-year contract extension. |
| Monday, February 5th, 2018 | | Placed SP J. Okane on the active roster. |
| Wednesday, January 31st, 2018 | | Signed free agent SP J. Okane to a 2-year contract worth a total of $18,000,000. |
| Monday, January 22nd, 2018 | | Placed 1B F. Armendariz on the active roster. |
| Friday, January 19th, 2018 | | Signed free agent 1B F. Armendariz to a 1-year contract worth a total of $490,000. |
| Monday, January 15th, 2018 | | Placed CF A. Suarez on the active roster. |
| Wednesday, January 10th, 2018 | | Signed free agent CF A. Suarez to a 1-year contract worth a total of $1,335,000. |
| Monday, January 8th, 2018 | | MR B. Riojas was designated for assignment and placed on waivers. | | Purchased the contract of RF J. Custard from Triple A Pukalani. | | Placed RF J. Custard on the 60-day disabled list. | | Placed 3B B. Parker on the active roster. |
| Saturday, January 6th, 2018 | | Signed free agent 3B B. Parker to a 4-year contract worth a total of $33,350,000. |
| Monday, January 1st, 2018 | | Placed C T. Geter on the active roster. |
| Friday, December 29th, 2017 | | Signed free agent C T. Geter to a 1-year contract worth a total of $13,550,000. |
| Monday, December 18th, 2017 | | Purchased the contract of CF R. Kondo from Triple A Pukalani. |
| Friday, December 1st, 2017 | | Placed LF A. Fernandez on the active roster. |
| Wednesday, November 29th, 2017 | | Signed free agent LF A. Fernandez to a 1-year contract worth a total of $520,000. |
| Monday, November 27th, 2017 | | Placed CL A. Cabaña on the active roster. |
| Saturday, November 25th, 2017 | | Signed free agent CL A. Cabaña to a 1-year contract worth a total of $910,000. |
| Tuesday, November 14th, 2017 | | Signed 3B O. Cabrales to a 3-year contract extension worth a total of $34,980,000. |
| Monday, November 6th, 2017 | | Placed MR R. Mumford on the active roster. | | Activated MR R. Mumford from the disabled list. |
| Thursday, November 2nd, 2017 | | MR C. Árias received a 1-year contract through automatic renewal worth a total of $300,000. | | MR R. Holland received a 1-year contract through automatic renewal worth a total of $300,000. | | 1B T. Palacio becomes a free-agent. | | C H. Gossard becomes a free-agent. | | RF H. Davila becomes a free-agent. | | SP J. Morales becomes a free-agent. | | SS G. Sequeiros received a 1-year contract through automatic renewal worth a total of $300,000. | | MR K. Kepner received a 1-year contract through automatic renewal worth a total of $300,000. | | MR R. Mumford received a 1-year contract through automatic renewal worth a total of $300,000. | | MR D. Beene becomes a free-agent. |
| Monday, October 30th, 2017 | | C D. Stiger received a 1-year contract through arbitration worth a total of $324,000. | | MR E. Thomas received a 1-year contract through arbitration worth a total of $1,848,320. | | RF J. Reeve received a 1-year contract through arbitration worth a total of $400,200. | | SP F. Pineda received a 1-year contract through arbitration worth a total of $2,580,480. | | 2B J. Lefebvre received a 1-year contract through arbitration worth a total of $5,192,000. | | 3B O. Cabrales received a 1-year contract through arbitration worth a total of $6,395,000. | | RF J. Custard received a 1-year contract through arbitration worth a total of $648,000. |
| Wednesday, October 11th, 2017 | | Signed team doctor K. Cole to a 4-year, $465,000 per year contract. |
| Tuesday, October 10th, 2017 | | DO Jerry Sullivan retires. | | Voided the team option year of RF J. Custard. | | Demoted CF R. Kondo to Triple A Pukalani. | | Executed the last optional contract year of CL T. Vallejo. | | Released 1B J. Hodge. | | Placed MR R. Mumford on the 15-day disabled list. |
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