| | | | | | | | | | |  | Major Transactions |
| | | | Tuesday, October 2nd, 2018 | | Signed MR J. Eyman to a 1-year contract extension worth a total of $2,500,000. |
| Friday, September 21st, 2018 | | Signed MR D. Dinwiddie to a 1-year contract extension worth a total of $600,000. | | Signed CL J. Cuomo to a 3-year contract extension worth a total of $43,700,000. |
| Tuesday, March 20th, 2018 | | CF C. Fix was claimed off waivers from Saskatoon. |
| Monday, March 12th, 2018 | | Traded a 6th round draft pick to the Seattle Monarchs, getting 25-year old minor league reliever A. Nakano in return. |
| Monday, January 15th, 2018 | | SP M. Lawrence was designated for assignment and placed on waivers. | | Placed MR J. Cropper on the active roster. |
| Thursday, January 11th, 2018 | | Signed free agent MR J. Cropper to a 1-year contract worth a total of $420,000. |
| Saturday, December 30th, 2017 | | Signed free agent SP K. Byers to a 3-year contract worth a total of $14,500,000. |
| Sunday, December 24th, 2017 | | Signed free agent C W. Ward to a 1-year contract worth a total of $600,000. |
| Monday, November 27th, 2017 | | Placed SS R. Peppers on the active roster. | | Activated SS R. Peppers from the disabled list. |
| Friday, November 24th, 2017 | | Placed 3B N. Yang on the active roster. |
| Monday, November 6th, 2017 | | Signed free agent 3B N. Yang to a 1-year contract worth a total of $430,000. |
| Thursday, November 2nd, 2017 | | SP J. Kautz received a 1-year contract through automatic renewal worth a total of $300,000. | | RF I. López received a 1-year contract through automatic renewal worth a total of $300,000. | | SP J. Cooper received a 1-year contract through automatic renewal worth a total of $300,000. | | CL J. Curry received a 1-year contract through automatic renewal worth a total of $300,000. | | SP E. Guzman received a 1-year contract through automatic renewal worth a total of $300,000. | | CF C. Horta received a 1-year contract through automatic renewal worth a total of $300,000. | | C W. Guzman becomes a free-agent. | | MR M. Lawrence received a 1-year contract through automatic renewal worth a total of $300,000. | | CL J. Theriault becomes a free-agent. | | 1B D. Seibel received a 1-year contract through automatic renewal worth a total of $300,000. | | 2B F. Mendoza received a 1-year contract through automatic renewal worth a total of $500,000. | | SP J. Shuttleworth becomes a free-agent. |
| Monday, October 30th, 2017 | | SP W. Lawrence received a 1-year contract through arbitration worth a total of $3,236,100. | | C G. Herrera received a 1-year contract through arbitration worth a total of $5,016,600. | | SS C. Gomez received a 1-year contract through arbitration worth a total of $337,500. | | 1B F. Soriano received a 1-year contract through arbitration worth a total of $777,600. | | 3B C. Santoyo received a 1-year contract through arbitration worth a total of $570,000. | | LF S. Evanoff received a 1-year contract through arbitration worth a total of $5,124,600. |
| Monday, October 23rd, 2017 | | Placed CL J. Cuomo on the active roster. |
| Monday, October 16th, 2017 | | Traded 23-year old minor league left fielder S. Keo, 22-year old minor league catcher B. Maxon and a 2nd round draft pick to the Seattle Monarchs, getting 33-year old closer J. Cuomo in return. |
| Tuesday, October 10th, 2017 | | SP J. Shuttleworth voids his last optional contract year. |
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