Athletics Roster & Staff
Transactions
| Date | Transaction |
| 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 sent RHP Geoff Hartlieb outright to Las Vegas Aviators. |
| 07/04/26 | Athletics optioned SS Darell Hernaiz to Las Vegas Aviators. |
| 07/04/26 | Athletics selected the contract of C Brian Serven from Las Vegas Aviators. |
| 07/04/26 | Athletics optioned 1B Joey Meneses to Las Vegas Aviators. |
| 07/03/26 | Athletics designated RHP Geoff Hartlieb for assignment. |
| 07/03/26 | Athletics activated RHP Mark Leiter Jr. from the 15-day injured list. |
| 07/02/26 | Athletics activated LHP José Suarez from the paternity list. |
| 07/02/26 | Athletics designated LHP Matt Krook for assignment. |
| 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. |