| Tuesday, November 20th, 2018 |
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| SP Stan Aldridge received a 1-year contract through automatic renewal worth a total of $400,000. | | LF Diego González received a 1-year contract through automatic renewal worth a total of $400,000. | | SP Li-xue Si-ma received a 1-year contract through automatic renewal worth a total of $400,000. | | SS David Becker received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Bernardo Robles received a 1-year contract through automatic renewal worth a total of $400,000. | | RF Pat Jones received a 1-year contract through automatic renewal worth a total of $400,000. | | MR Juan González received a 1-year contract through automatic renewal worth a total of $400,000. | | LF Marcos Reyes received a 1-year contract through automatic renewal worth a total of $400,000. | | CL Jeong Pak received a 1-year contract through automatic renewal worth a total of $400,000. |
| Saturday, November 17th, 2018 |
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| CL Pedro Magana received a 1-year contract through arbitration worth a total of $3,250,000. | | SP José Torres received a 1-year contract through arbitration worth a total of $8,750,000. | | SP Dong-hyun Kim received a 1-year contract through arbitration worth a total of $2,000,000. | | MR Takehide Ono received a 1-year contract through arbitration worth a total of $3,500,000. | | 1B Wilson Sánchez was not offered arbitration, becomes a free agent. | | 3B Robert Stokes received a 1-year contract through arbitration worth a total of $850,000. | | SP Mabuchi Yoshida received a 1-year contract through arbitration worth a total of $3,600,000. | | C Carlos Martínez received a 1-year contract through arbitration worth a total of $750,000. | | SS Kazushige Aoki received a 1-year contract through arbitration worth a total of $750,000. | | RF Byung-soo So was not offered arbitration, becomes a free agent. | | MR José Salinas received a 1-year contract through arbitration worth a total of $4,000,000. | | CF Tristan van Kastel received a 1-year contract through arbitration worth a total of $750,000. |
| Sunday, November 11th, 2018 |
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| Signed pitching coach Tim Taylor to a 4-year, $900,000 per year contract. |
| Saturday, October 27th, 2018 |
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| PC Clarence Jordan retires. |
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