| Injury Log |
| Monday, December 15th, 2025 |
 2B Héctor Rodríguez was injured when he collided with a parked car while drunk. Diagnosis: bruised thigh. This is a day-to-day injury expected to last 4 days. |
| Friday, December 12th, 2025 |
 Brit Murphy has suffered a setback in his recovery. He is not expected to recover for another one week. |
| Major Transactions Log |
| Monday, December 15th, 2025 |
 Signed free agent C Evan Skoug to a 1-year contract worth a total of $3,200,000. |
 Signed free agent RP Zack Jackson to a 2-year contract worth a total of $5,200,000. |
 Signed RP Brenden Heiss to a 4-year contract extension worth a total of $26,000,000. |
 Signed free agent SP Robert Gsellman to a 3-year contract worth a total of $3,600,000. |
 Signed free agent RP Jake Stinnett to a 2-year contract worth a total of $5,600,000. |
 The Detroit Tigers traded 24-year-old minor league starting pitcher Joe Davis and 21-year-old minor league center fielder Eric Calderón to the Los Angeles Dodgers, getting 29-year-old catcher Brady Cherry and 19-year-old minor league starting pitcher Aloísio Rodeia in return. |
| The Oakland Athletics traded 24-year-old catcher Eddie Case to the Boston Red Sox, getting 21-year-old minor league starting pitcher Ben McAllister in return. |
| The Detroit Tigers traded 19-year-old minor league starting pitcher Aurelio Collazo to the Cleveland Indians, getting 21-year-old minor league starting pitcher Raúl Madrigal in return. |
| The New York Mets traded 36-year-old right fielder Jason Heyward and 20-year-old minor league catcher Danny Buck to the Texas Rangers, getting 20-year-old minor league first baseman António Guerrero in return. |
| Sunday, December 14th, 2025 |
| Placed RP Cam Bedrosian on the active roster. |
| Friday, December 12th, 2025 |
 Placed 2B Starlin Castro on the active roster. |
| Thursday, December 11th, 2025 |
| Claimed RP Greg Little off waivers from San Francisco. |
| Monday, December 8th, 2025 |
| The St. Louis Cardinals traded 16-year-old minor league center fielder Juan Rodríguez to the Seattle Mariners, getting $1 in cash in return. |
| The Baltimore Orioles traded 21-year-old minor league second baseman Tim Edwards to the Cincinnati Reds, getting 23-year-old right fielder Sam Hall and 26-year-old minor league reliever Connor Manous in return. |
| Placed RF Sam Hall on the active roster. |
 C Mike Papierski was designated for assignment and placed on waivers. |
 Placed LF Wil Myers on the active roster. |
| Activated LF Wil Myers from the disabled list. |
 1B Liam Lodge was designated for assignment and placed on waivers. |