| Sunday, December 30th, 2018 |
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| Signed free agent RF Dante Owens to a minor league contract. |
| Tuesday, November 20th, 2018 |
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| SP Román Castillo received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Santiago Valentín received a 1-year contract through automatic renewal worth a total of $400,000. | | CL Esteban Juárez received a 1-year contract through automatic renewal worth a total of $400,000. | | 1B Manuel Domínguez received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Ángel Francisco received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Esteban Tavárez becomes a free-agent. | | 1B John Fowler becomes a free-agent. | | SP Mike Campbell received a 1-year contract through automatic renewal worth a total of $400,000. | | MR León Gómez received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Lou Peterson received a 1-year contract through automatic renewal worth a total of $400,000. | | RF Leo Wyeth received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Tim Fulgham becomes a free-agent. |
| Monday, November 19th, 2018 |
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| Signed scouting director António Ramírez to a 3-year, $150,000 per year contract. |
| Sunday, November 18th, 2018 |
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| Signed bench coach Eduardo Ortíz to a 3-year, $880,000 per year contract. |
| Saturday, November 17th, 2018 |
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| SS José Ortíz received a 1-year contract through arbitration worth a total of $650,000. | | MR José Fontanez received a 1-year contract through arbitration worth a total of $750,000. | | MR Roberto Costello was not offered arbitration, becomes a free agent. | | C Pete McLearn was not offered arbitration, becomes a free agent. | | C Fernando Deleón received a 1-year contract through arbitration worth a total of $650,000. | | RF Peter Thomas received a 1-year contract through arbitration worth a total of $1,375,000. | | LF Hua Er was not offered arbitration, becomes a free agent. | | SS Víctor Franco received a 1-year contract through arbitration worth a total of $850,000. | | MR Juan Fontanez was not offered arbitration, becomes a free agent. | | C Walt Taylor becomes a free-agent. |
| Saturday, October 27th, 2018 |
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| Bench Coach Tom Lyons leaves the team, his contract was not renewed. | | Scouting Director John Connolly leaves the team, his contract was not renewed. |
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