Athletics Roster & Staff
Transactions
| Date | Transaction |
| 08/28/26 | Athletics activated LHP José Suarez from the 15-day injured list. |
| 08/28/26 | Athletics optioned LHP Drew Rom to Las Vegas Aviators. |
| 08/26/26 | Athletics activated RHP Chris Roycroft. |
| 08/26/26 | Athletics optioned RHP Hayden Juenger to Las Vegas Aviators. |
| 08/25/26 | Athletics transferred SS Jacob Wilson from the 10-day injured list to the 60-day injured list. Left shoulder subluxation. |
| 08/25/26 | Athletics claimed RHP Chris Roycroft off waivers from Tampa Bay Rays. |
| 08/21/26 | Athletics placed SS Jacob Wilson on the 10-day injured list. Left shoulder subluxation. |
| 08/21/26 | Athletics transferred 1B Nick Kurtz from the 10-day injured list to the 60-day injured list. Strained right thumb. |
| 08/21/26 | Athletics claimed RF Johnathan Rodríguez off waivers from Pittsburgh Pirates. |
| 08/21/26 | Athletics recalled RHP Kade Morris from Las Vegas Aviators. |
| 08/21/26 | Athletics selected the contract of 2B Michael Stefanic from Las Vegas Aviators. |
| 08/21/26 | Athletics optioned RHP Taylor Rashi to Las Vegas Aviators. |
| 08/19/26 | Athletics activated LHP Jeffrey Springs from the 15-day injured list. |
| 08/19/26 | Athletics optioned RHP Seth Johnson to Las Vegas Aviators. |
| 08/18/26 | Athletics sent CF Denzel Clarke on a rehab assignment to Las Vegas Aviators. |
| 08/18/26 | Athletics sent CF Denzel Clarke on a rehab assignment to Las Vegas Aviators. |
| 08/18/26 | Athletics optioned RHP Mason Barnett to Las Vegas Aviators. |
| 08/18/26 | Athletics recalled RHP Taylor Rashi from Las Vegas Aviators. |
| 08/17/26 | Athletics optioned LHP Joe Rock to Las Vegas Aviators. |
| 08/16/26 | Athletics transferred RHP Justin Sterner from the 15-day injured list to the 60-day injured list. Right knee chondromalacia. |
| 08/16/26 | Athletics placed LF Tyler Soderstrom on the 10-day injured list retroactive to August 15, 2026. Left hip impingement. |
| 08/16/26 | Athletics recalled SS Darell Hernaiz from Las Vegas Aviators. |
| 08/16/26 | Athletics claimed LHP Joe Rock off waivers from Chicago White Sox. |
| 08/15/26 | Athletics traded SS Jonathan Ornelas to Milwaukee Brewers for cash. |
| 08/14/26 | Athletics signed free agent SS Jonathan Ornelas to a minor league contract. |
| 08/14/26 | Athletics sent LHP Jeffrey Springs on a rehab assignment to Stockton Ports. |
| 08/12/26 | Athletics placed LHP José Suarez on the 15-day injured list. Right hip strain. |
| 08/12/26 | Athletics activated LHP Drew Rom. |
| 08/12/26 | Athletics sent SS Jonathan Ornelas outright to Las Vegas Aviators. |
| 08/12/26 | Athletics optioned RHP Yunior Tur to Las Vegas Aviators. |
| 08/12/26 | Athletics recalled RHP Hayden Juenger from Las Vegas Aviators. |
| 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 activated 3B Zack Gelof from the 10-day injured list. |
| 08/10/26 | Athletics designated SS Jonathan Ornelas for assignment. |
| 08/09/26 | Athletics optioned RHP Taylor Rashi to Las Vegas Aviators. |
| 08/09/26 | Athletics claimed RHP Taylor Rashi off waivers from Minnesota Twins. |
| 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 sent 3B Zack Gelof on a rehab assignment 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 designated LHP Ben Bowden for assignment. |
| 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 activated RHP J.T. Ginn from the 15-day injured list. |
| 08/04/26 | Athletics sent RHP Chen Zhong-Ao Zhuang outright to Las Vegas Aviators. |
| 08/04/26 | Kansas City Royals claimed LHP Connor Thomas off waivers from Athletics. |
| 08/04/26 | Athletics recalled 3B Max Muncy from Las Vegas Aviators. |
| 08/04/26 | Athletics sent RHP Chen Zhong-Ao Zhuang outright to Las Vegas Aviators. |
| 08/03/26 | Athletics signed free agent SS Cade Fujii to a minor league contract. |
| 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 optioned RHP Luis Morales to Las Vegas Aviators. |
| 08/01/26 | Athletics selected the contract of LHP Ben Bowden from Las Vegas Aviators. |