Athletics Roster & Staff
Transactions
| Date | Transaction |
| 08/11/26 | Athletics signed free agent RHP Flasherming Ernesto to a minor league contract. |
| 08/11/26 | Athletics claimed LHP Drew Rom off waivers from Milwaukee Brewers. |
| 08/10/26 | Athletics designated SS Jonathan Ornelas for assignment. |
| 08/10/26 | Athletics activated 3B Zack Gelof from the 10-day injured list. |
| 08/09/26 | Athletics claimed RHP Taylor Rashi off waivers from Minnesota Twins. |
| 08/09/26 | Athletics optioned RHP Taylor Rashi to Las Vegas Aviators. |
| 08/08/26 | Athletics optioned RHP Hayden Juenger to Las Vegas Aviators. |
| 08/08/26 | Athletics recalled RHP Yunior Tur from Las Vegas Aviators. |
| 08/07/26 | Athletics signed free agent RHP Matt Sauer to a minor league contract. |
| 08/06/26 | Athletics sent LHP Ben Bowden outright to Las Vegas Aviators. |
| 08/04/26 | Athletics placed LHP Jeffrey Springs on the 15-day injured list retroactive to August 1, 2026. Right hip discomfort. |
| 08/04/26 | Athletics activated RHP J.T. Ginn from the 15-day injured list. |
| 08/04/26 | Athletics sent 3B Zack Gelof on a rehab assignment to Las Vegas Aviators. |
| 08/04/26 | Athletics placed 1B Nick Kurtz on the 10-day injured list retroactive to August 1, 2026. Strained right thumb. |
| 08/04/26 | Athletics activated RHP Seth Johnson. |
| 08/04/26 | Athletics designated LHP Ben Bowden for assignment. |
| 08/04/26 | Kansas City Royals claimed LHP Connor Thomas off waivers from Athletics. |
| 08/04/26 | Athletics sent RHP Chen Zhong-Ao Zhuang outright to Las Vegas Aviators. |
| 08/04/26 | Athletics sent RHP Chen Zhong-Ao Zhuang outright to Las Vegas Aviators. |
| 08/04/26 | Athletics recalled 3B Max Muncy from Las Vegas Aviators. |
| 08/03/26 | Philadelphia Phillies traded RHP Seth Johnson to Athletics for RF Colby Thomas. |
| 08/03/26 | Philadelphia Phillies traded RHP Seth Johnson to Athletics for RF Colby Thomas. |
| 08/01/26 | Athletics designated LHP Connor Thomas for assignment. |
| 08/01/26 | Athletics selected the contract of LHP Ben Bowden from Las Vegas Aviators. |
| 08/01/26 | Athletics optioned RHP Luis Morales to Las Vegas Aviators. |