| | | | | | | | | | |  | Major Transactions |
| | | | Thursday, September 27th, 2018 | | Signed 2B P. Reyes to a 2-year contract extension worth a total of $2,200,000. |
| Monday, September 24th, 2018 | | Signed free agent 2B W. Satterlee to a 1-year contract worth a total of $3,290,000. | | 1B G. Mudge was designated for assignment and placed on waivers. | | Placed 2B W. Satterlee on the active roster. |
| Sunday, September 23rd, 2018 | | RF J. Reeve was designated for assignment and placed on waivers. | | LF L. Fenster was designated for assignment and placed on waivers. | | 2B J. Arenas was designated for assignment and placed on waivers. | | Demoted SP W. Haner to Triple A Tacoma. | | Demoted MR J. Burgess to Triple A Tacoma. | | MR M. Galindo was designated for assignment and placed on waivers. |
| Sunday, September 16th, 2018 | | Placed 1B G. Mudge on the active roster. | | Placed RF J. Reeve on the active roster. |
| Thursday, September 6th, 2018 | | Signed LF B. Frison to a 2-year contract extension worth a total of $47,720,000. |
| Monday, September 3rd, 2018 | | RF J. Reeve was claimed off waivers from Maui. |
| Sunday, September 2nd, 2018 | | Signed free agent 1B G. Mudge to a 1-year contract worth a total of $1,960,000. |
| Monday, July 30th, 2018 | | SP J. Morales was designated for assignment and placed on waivers. | | Purchased the contract of MR B. Ch'on from Triple A Tacoma. | | Traded 36-year old starting pitcher J. Morales, a 3rd round draft pick and $12,000,000 in cash to the Hickory Huskers, getting 19-year old minor league second baseman P. Campos in return. |
| Thursday, May 17th, 2018 | | Signed Pitching Coach P. Baker to a 5-year contract extension. |
| Wednesday, May 2nd, 2018 | | Signed free agent MR B. Ch'on to a 1-year contract worth a total of $670,000. |
| Tuesday, May 1st, 2018 | | Demoted SP J. Cruz to Triple A Tacoma. | | Purchased the contract of SP E. Hernández from Triple A Tacoma. | | SP J. Macaluso was designated for assignment and placed on waivers. | | SP J. Cruz was designated for assignment and placed on waivers. | | MR D. Welburn was designated for assignment and placed on waivers. | | Purchased the contract of SP J. Morrales from Triple A Tacoma. | | Traded 30-year old starting pitcher J. Macaluso, 28-year old starting pitcher J. Cruz, 25-year old reliever D. Welburn, a 4th round draft pick and $7,000,000 in cash to the Danville Dans, getting a 1st round draft pick in return. |
| Monday, March 5th, 2018 | | Placed RF F. Spracklin on the active roster. |
| Saturday, March 3rd, 2018 | | Signed free agent RF F. Spracklin to a 2-year contract worth a total of $600,000. |
| Thursday, March 1st, 2018 | | Traded 23-year old minor league catcher B. Maxon and $2,500,000 in cash to the Hickory Huskers, getting 24-year old minor league first baseman J. Dodd in return. | | Traded 23-year old minor league catcher B. Maxon and $2,500,000 in cash to the Hickory Huskers, getting 24-year old minor league first baseman J. Dodd in return. | | Placed 1B J. Dodd on the active roster. |
| Saturday, February 17th, 2018 | | Signed C A. Granado to a 2-year contract extension worth a total of $24,000,000. |
| Monday, February 5th, 2018 | | Placed SP J. Morales on the active roster. |
| Saturday, February 3rd, 2018 | | Signed free agent SP J. Morales to a 1-year contract worth a total of $5,000,000. |
| Friday, December 8th, 2017 | | Signed free agent SS M. Pérez to a 1-year contract worth a total of $4,010,000. |
| Saturday, December 2nd, 2017 | | Signed MR D. Davis to a 2-year contract extension worth a total of $14,000,000. |
| Tuesday, November 28th, 2017 | | Signed free agent 1B J. Guzman to a 2-year contract worth a total of $1,750,000. |
| Wednesday, November 22nd, 2017 | | Signed SP R. Placencia to a 3-year contract extension worth a total of $58,350,000. |
| Thursday, November 9th, 2017 | | Signed MR R. Riddick to a 3-year contract extension worth a total of $4,800,000. |
| Monday, November 6th, 2017 | | Placed RF B. Frison on the active roster. | | Placed MR R. Riddick on the active roster. |
| Thursday, November 2nd, 2017 | | LF S. Keo received a 1-year contract through automatic renewal worth a total of $300,000. | | 3B R. Quijada becomes a free-agent. | | 1B G. Marzano becomes a free-agent. | | RF D. Kerry becomes a free-agent. | | MR J. Stoker received a 1-year contract through automatic renewal worth a total of $300,000. | | 3B G. Reyna received a 1-year contract through automatic renewal worth a total of $300,000. | | CF B. Bijkerk received a 1-year contract through automatic renewal worth a total of $300,000. | | C K. Craig received a 1-year contract through automatic renewal worth a total of $300,000. | | MR D. Welburn received a 1-year contract through automatic renewal worth a total of $300,000. | | CF P. Martínez received a 1-year contract through automatic renewal worth a total of $300,000. |
| Monday, October 30th, 2017 | | Placed RF D. Kerry on the active roster. | | Activated RF D. Kerry from the disabled list. | | Traded 24-year old minor league shortstop L. Cedeño, 21-year old minor league right fielder R. Washington and $2,000,000 in cash to the Brooklyn Wolves, getting 23-year old reliever R. Riddick in return. | | Traded 23-year old starting pitcher F. Crown, 19-year old minor league catcher C. Cordero and $800,000 in cash to the Saskatoon Amigos, getting 35-year old right fielder B. Frison and a 2nd round draft pick in return. | | CF R. Rosato received a 1-year contract through arbitration worth a total of $337,500. | | 2B R. Ferrer received a 1-year contract through arbitration worth a total of $331,200. | | C A. Granado received a 1-year contract through arbitration worth a total of $6,980,000. | | SP J. Cruz received a 1-year contract through arbitration worth a total of $1,462,800. | | 2B P. Reyes received a 1-year contract through arbitration worth a total of $3,596,400. |
| Wednesday, October 25th, 2017 | | LF A. Callahan was claimed off waivers from Maui. |
| Monday, October 23rd, 2017 | | Placed LF S. Keo on the active roster. | | SP T. Yuji was designated for assignment and placed on waivers. | | RF J. Thomas was designated for assignment and placed on waivers. |
| Monday, October 16th, 2017 | | CF R. Rosato was designated for assignment and placed on waivers. | | Traded 33-year old closer J. Cuomo to the Los Angeles Scorpions, getting 23-year old minor league left fielder S. Keo, 22-year old minor league catcher B. Maxon and a 2nd round draft pick in return. |
| Tuesday, October 10th, 2017 | | RF D. Kerry voids his last optional contract year. | | Executed the last optional contract year of CL J. Cuomo. |
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