Athletics Roster & Staff
Transactions
| Date | Transaction |
| 07/31/26 | Athletics designated RHP Chen Zhong-Ao Zhuang for assignment. |
| 07/31/26 | Athletics selected the contract of SS Jonathan Ornelas from Las Vegas Aviators. |
| 07/31/26 | Athletics optioned LHP Connor Thomas to Las Vegas Aviators. |
| 07/31/26 | Athletics optioned RF Colby Thomas to Las Vegas Aviators. |
| 07/30/26 | Athletics transferred RHP Mark Leiter Jr. from the 15-day injured list to the 60-day injured list. Right hip impingement. |
| 07/30/26 | Athletics signed free agent RHP Yelfi Garcia to a minor league contract. |
| 07/30/26 | Athletics claimed LHP Connor Thomas off waivers from Atlanta Braves. |
| 07/29/26 | Athletics sent RHP Geoff Hartlieb outright to Las Vegas Aviators. |
| 07/28/26 | Athletics signed free agent RHP Max McGwire to a minor league contract. |
| 07/27/26 | Athletics designated RHP Geoff Hartlieb for assignment. |
| 07/27/26 | Athletics signed free agent 1B James Whitman to a minor league contract. |
| 07/27/26 | Athletics signed RHP Jacob Dudan. |
| 07/27/26 | Athletics signed C Bear Madliak. |
| 07/27/26 | Athletics signed C Alex Sosa. |
| 07/27/26 | Athletics signed RHP David Rossow. |
| 07/27/26 | Athletics signed OF Javar Williams. |
| 07/27/26 | Athletics signed RHP Aidan Weaver. |
| 07/27/26 | Athletics signed C Anthony Marnell IV. |
| 07/27/26 | Athletics signed 2B Tanner Marsh. |
| 07/27/26 | Athletics signed SS Roman Martin. |
| 07/27/26 | Athletics signed RHP Tyler August. |
| 07/27/26 | Athletics signed RHP Nathan Aceves. |
| 07/27/26 | Athletics signed 3B Javier Gorostola. |
| 07/27/26 | Athletics signed RHP Gabe Gaeckle. |
| 07/27/26 | Athletics signed free agent RHP Colin Fitzgerald to a minor league contract. |
| 07/27/26 | Athletics signed RHP Caden Sivrich. |
| 07/27/26 | Athletics signed free agent RHP Mason Patel to a minor league contract. |
| 07/27/26 | Athletics signed RHP Dominic Mauro. |
| 07/27/26 | Athletics signed LHP Evan Blanco. |
| 07/27/26 | Athletics signed free agent C Max Aude to a minor league contract. |
| 07/27/26 | Athletics activated RHP Scott Blewett. |
| 07/27/26 | Athletics signed free agent SS KJ White to a minor league contract. |
| 07/27/26 | Athletics signed 3B Alex Hernandez. |
| 07/27/26 | Athletics signed LHP Mason Edwards. |
| 07/27/26 | Athletics signed OF Dylan O'Connell. |
| 07/27/26 | Athletics signed free agent SS Shintaro Inoue to a minor league contract. |
| 07/26/26 | Athletics placed C Shea Langeliers on the 10-day injured list retroactive to July 25, 2026. Torn meniscus in right knee. |
| 07/26/26 | St. Louis Cardinals traded RHP Scott Blewett to Athletics for cash. |
| 07/26/26 | Athletics recalled C Brian Serven from Las Vegas Aviators. |
| 07/25/26 | Athletics signed free agent LHP Dallas Keuchel to a minor league contract. |
| 07/25/26 | Athletics activated 1B Nick Kurtz from the 10-day injured list. |
| 07/25/26 | Athletics optioned 3B Max Muncy to Las Vegas Aviators. |
| 07/24/26 | Athletics signed free agent SS Jonathan Ornelas to a minor league contract. |
| 07/24/26 | Athletics recalled RHP Luis Morales from Las Vegas Aviators. |
| 07/23/26 | Athletics signed OF Drew Burress. |
| 07/23/26 | Athletics optioned RHP Yunior Tur to Las Vegas Aviators. |
| 07/22/26 | Athletics placed RHP J.T. Ginn on the 15-day injured list retroactive to July 18, 2026. Right middle finger blister. |
| 07/22/26 | Athletics recalled RHP Mason Barnett from Las Vegas Aviators. |
| 07/21/26 | Athletics placed RHP Mark Leiter Jr. on the 15-day injured list retroactive to July 19, 2026. Right hip impingement. |
| 07/21/26 | Athletics placed 3B Joshua Kuroda-Grauer on the 10-day injured list. Ruptured testicle surgery. |
| 07/21/26 | Athletics recalled 3B Max Muncy from Las Vegas Aviators. |
| 07/21/26 | Athletics recalled RHP Hayden Juenger from Las Vegas Aviators. |
| 07/20/26 | Athletics acquired OF Alex Fernandes from the Glacier Range Riders of the Pioneer League. |
| 07/20/26 | Athletics sent 1B Joey Meneses outright to Las Vegas Aviators. |
| 07/18/26 | Athletics designated 1B Joey Meneses for assignment. |
| 07/18/26 | Athletics placed RHP Justin Sterner on the 15-day injured list. Right knee chondromalacia. |
| 07/18/26 | Athletics traded RHP Aaron Civale to Chicago Cubs for RHP Aiden Moffett. |
| 07/18/26 | Athletics selected the contract of RHP Geoff Hartlieb from Las Vegas Aviators. |
| 07/18/26 | Athletics traded RHP Aaron Civale to Chicago Cubs for RHP Aiden Moffett. |
| 07/17/26 | Athletics transferred DH Brent Rooker from the 10-day injured list to the 60-day injured list. Bone bruise in left knee. |
| 07/17/26 | Athletics selected the contract of 3B Tommy White from Las Vegas Aviators. |
| 07/15/26 | Athletics activated 3B Donovan Walton. |
| 07/15/26 | Athletics designated RHP Aaron Civale for assignment. |
| 07/15/26 | Athletics activated 2B Donovan Walton. |
| 07/15/26 | Athletics optioned C Brian Serven to Las Vegas Aviators. |
| 07/15/26 | Athletics optioned 1B Joey Meneses to Las Vegas Aviators. |
| 07/15/26 | Athletics selected the contract of RHP Yunior Tur from Las Vegas Aviators. |
| 07/15/26 | Athletics recalled LHP Brady Basso from Las Vegas Aviators. |
| 07/15/26 | Athletics optioned RHP Mason Barnett to Las Vegas Aviators. |
| 07/12/26 | Athletics claimed 3B Donovan Walton off waivers from Los Angeles Angels. |
| 07/11/26 | Athletics placed 1B Nick Kurtz on the 10-day injured list retroactive to July 10, 2026. Right thumb capsule sprain. |
| 07/11/26 | Athletics recalled C Brian Serven from Las Vegas Aviators. |
| 07/10/26 | Athletics placed 1B Nick Kurtz on the 10-day injured list. Right thumb capsule sprain. |
| 07/10/26 | Athletics placed 3B Zack Gelof on the 10-day injured list. Right knee laceration. |
| 07/10/26 | Athletics recalled 1B Joey Meneses from Las Vegas Aviators. |
| 07/08/26 | Athletics activated LF Tyler Soderstrom from the 10-day injured list. |
| 07/08/26 | Athletics optioned 3B Max Muncy to Las Vegas Aviators. |
| 07/07/26 | Athletics activated SS Jacob Wilson from the 10-day injured list. |
| 07/07/26 | Athletics recalled LHP Jacob Lopez from Las Vegas Aviators. |
| 07/07/26 | Athletics optioned RHP Kade Morris to Las Vegas Aviators. |
| 07/07/26 | Athletics optioned C Brian Serven to Las Vegas Aviators. |
| 07/06/26 | Athletics optioned RHP Kade Morris to Las Vegas Aviators. |
| 07/05/26 | Athletics released RHP Michael Kelly. |
| 07/04/26 | Athletics activated 3B Zack Gelof from the 10-day injured list. |
| 07/04/26 | Washington Nationals claimed LHP Matt Krook off waivers from Athletics. |
| 07/04/26 | Athletics optioned SS Darell Hernaiz to Las Vegas Aviators. |
| 07/04/26 | Athletics sent RHP Geoff Hartlieb outright to Las Vegas Aviators. |
| 07/04/26 | Athletics optioned 1B Joey Meneses to Las Vegas Aviators. |
| 07/04/26 | Athletics selected the contract of C Brian Serven from Las Vegas Aviators. |
| 07/03/26 | Athletics activated RHP Mark Leiter Jr. from the 15-day injured list. |
| 07/03/26 | Athletics designated RHP Geoff Hartlieb for assignment. |
| 07/02/26 | Athletics designated LHP Matt Krook for assignment. |
| 07/02/26 | Athletics activated LHP José Suarez from the paternity list. |
| 07/01/26 | Athletics traded 3B Brett Harris to Boston Red Sox for RHP Ben Hansen. |
| 07/01/26 | Athletics traded 3B Brett Harris to Boston Red Sox for RHP Ben Hansen. |