| Tuesday, November 27th, 2018 |
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| Signed bench coach Yoshinobu Maeda to a 1-year, $170,000 per year contract. |
| Tuesday, November 20th, 2018 |
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| SP Pierre Dumont received a 1-year contract through automatic renewal worth a total of $400,000. | | SS Justin Simmons received a 1-year contract through automatic renewal worth a total of $400,000. | | RF Miguel Montés received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Edgardo Martínez becomes a free-agent. | | DH Ramón Ruíz received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Júlio López becomes a free-agent. | | SP António Coronado received a 1-year contract through automatic renewal worth a total of $400,000. | | CF Félix Sánchez received a 1-year contract through automatic renewal worth a total of $400,000. | | 2B Goro Tanabe received a 1-year contract through automatic renewal worth a total of $400,000. | | LF Raúl Serrano received a 1-year contract through automatic renewal worth a total of $400,000. | | 2B Joe Broadhead received a 1-year contract through automatic renewal worth a total of $400,000. | | CF Chang-geun Kim received a 1-year contract through automatic renewal worth a total of $400,000. | | SP José Zamora received a 1-year contract through automatic renewal worth a total of $400,000. | | CF Wilson Martínez received a 1-year contract through automatic renewal worth a total of $400,000. |
| Saturday, November 17th, 2018 |
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| C José Montalvo received a 1-year contract through arbitration worth a total of $650,000. | | SP Abdul-Qadir bin Nasser received a 1-year contract through arbitration worth a total of $8,000,000. | | 2B Roberto Quiñonez received a 1-year contract through arbitration worth a total of $650,000. | | 1B Jorge Ramírez received a 1-year contract through arbitration worth a total of $650,000. | | SP José Castro received a 1-year contract through arbitration worth a total of $4,094,500. |
| Saturday, November 10th, 2018 |
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| Signed team doctor José Alonzo to a 5-year, $330,000 per year contract. |
| Wednesday, November 7th, 2018 |
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| Signed scouting director John Connolly to a 2-year, $240,000 per year contract. |
| Saturday, October 27th, 2018 |
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| DO Ángel Herrera retires. | | Bench Coach Júlio García leaves the team, his contract was not renewed. | | Scouting Director Maurice Beaulieu leaves the team, his contract was not renewed. |
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