| Saturday, December 29th, 2018 |
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| Placed SP Cody O'Reilly on the active roster. |
| Wednesday, December 12th, 2018 |
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| Signed RF Júlio Velásquez to a 4-year contract extension worth a total of $23,280,000. |
| Saturday, December 8th, 2018 |
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| Signed free agent C Gernot Renner to a 4-year contract worth a total of $12,000,000. | | Placed C Gernot Renner on the active roster. |
| Sunday, December 2nd, 2018 |
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| Signed 1B Juan Paredes to a 2-year contract extension worth a total of $7,600,000. |
| Saturday, December 1st, 2018 |
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| LF Júlio Lima was designated for assignment and placed on waivers. | | CF Ryan Brown was designated for assignment and placed on waivers. |
| Wednesday, November 28th, 2018 |
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| Signed CL Yoshihiro Hasegawa to a 4-year contract extension worth a total of $14,600,000. |
| Tuesday, November 27th, 2018 |
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| Signed 2B Bartolo López to a 4-year contract extension worth a total of $5,440,000. | | Signed CL Manuel Parra to a 4-year contract extension worth a total of $13,360,000. |
| Tuesday, November 20th, 2018 |
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| CF Kent MacDulothe received a 1-year contract through automatic renewal worth a total of $400,000. | | 1B Stan Page received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Marv Williams becomes a free-agent. | | C Juan Barrera received a 1-year contract through automatic renewal worth a total of $400,000. | | CF Roberto Ordóńez received a 1-year contract through automatic renewal worth a total of $400,000. | | SP José Hidalgo received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Won-min Im received a 1-year contract through automatic renewal worth a total of $400,000. | | 3B Dave Dawson received a 1-year contract through automatic renewal worth a total of $400,000. | | CL Juan Fuentes received a 1-year contract through automatic renewal worth a total of $400,000. | | LF Júlio Lima received a 1-year contract through automatic renewal worth a total of $400,000. | | RF José Alemán received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Luis Miguel Pacheco received a 1-year contract through automatic renewal worth a total of $400,000. | | CL Felipe Ramos becomes a free-agent. | | 1B Ian Oliver received a 1-year contract through automatic renewal worth a total of $400,000. | | 2B Félix Rosales received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Anastasio Freitas received a 1-year contract through automatic renewal worth a total of $400,000. |
| Saturday, November 17th, 2018 |
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| LF Wally Harris received a 1-year contract through arbitration worth a total of $800,000. | | SP Ricardo Maldonado was not offered arbitration, becomes a free agent. | | SP Christian Livingston received a 1-year contract through arbitration worth a total of $850,000. | | C Gernot Renner was not offered arbitration, becomes a free agent. | | RF Júlio Velásquez received a 1-year contract through arbitration worth a total of $4,800,000. | | 2B Bartolo López received a 1-year contract through arbitration worth a total of $1,300,000. | | MR Tony Árias received a 1-year contract through arbitration worth a total of $650,000. | | CL Manuel Parra received a 1-year contract through arbitration worth a total of $2,750,000. | | CL Yoshihiro Hasegawa received a 1-year contract through arbitration worth a total of $2,750,000. | | RF Tom Carpenter was not offered arbitration, becomes a free agent. |
| Friday, November 9th, 2018 |
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| Signed bench coach Brandon Kimball to a 5-year, $500,000 per year contract. |
| Monday, November 5th, 2018 |
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| Voided the team option year(s) of CL Felipe Ramos. | | Placed 1B Stan Page on the active roster. | | Activated 1B Stan Page from the 60-day disabled list. |
| Saturday, October 27th, 2018 |
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| Bench Coach Frank Wallace leaves the team, his contract was not renewed. |
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