Athletics Roster & Staff
Transactions
| Date | Transaction |
| 06/30/19 | Oakland Athletics placed RF Stephen Piscotty on the 10-day injured list. Right knee sprain. |
| 06/30/19 | Oakland Athletics recalled Franklin Barreto from Las Vegas Aviators. |
| 06/26/19 | Oakland Athletics recalled Daniel Mengden from Las Vegas Aviators. |
| 06/26/19 | Oakland Athletics optioned RHP J.B. Wendelken to Las Vegas Aviators. |
| 06/25/19 | Oakland Athletics selected the contract of SS Taylor Motter from New Britain Bees. |
| 06/24/19 | Oakland Athletics signed OF Jorge Romero. |
| 06/23/19 | Oakland Athletics placed RHP Blake Treinen on the 10-day injured list retroactive to June 21, 2019. Right shoulder strain. |
| 06/23/19 | Oakland Athletics selected the contract of RHP Brian Schlitter from Las Vegas Aviators. |
| 06/21/19 | Oakland Athletics placed RHP Frankie Montas on the restricted list. |
| 06/21/19 | Oakland Athletics recalled J.B. Wendelken from Las Vegas Aviators. |
| 06/17/19 | Oakland Athletics signed LHP Brady Basso. |
| 06/17/19 | Oakland Athletics signed RHP Tyler Baum. |
| 06/17/19 | Oakland Athletics signed SS Logan Davidson. |
| 06/16/19 | Oakland Athletics signed C Drew Millas. |
| 06/16/19 | Oakland Athletics signed RHP Brock Whittlesey. |
| 06/16/19 | Oakland Athletics signed RHP Seth Shuman. |
| 06/16/19 | Oakland Athletics signed RHP Jose Dicochea. |
| 06/16/19 | Oakland Athletics signed RHP Dominic Yearego. |
| 06/13/19 | Oakland Athletics sent C Chris Herrmann on a rehab assignment to Las Vegas Aviators. |
| 06/13/19 | Oakland Athletics signed free agent RHP Cole Gray to a minor league contract. |
| 06/10/19 | Oakland Athletics signed C Jared McDonald. |
| 06/10/19 | Oakland Athletics signed 3B Dustin Harris. |
| 06/10/19 | Oakland Athletics signed SS Sahid Valenzuela. |
| 06/10/19 | Oakland Athletics signed RHP Jack Cushing. |
| 06/10/19 | Oakland Athletics signed 3B Gavin Jones. |
| 06/10/19 | Oakland Athletics signed 2B Michael Woodworth. |
| 06/10/19 | Oakland Athletics signed RHP Edward Baram. |
| 06/10/19 | Oakland Athletics signed RHP Zach Rafuse. |
| 06/10/19 | Oakland Athletics signed RHP Jake Walkinshaw. |
| 06/10/19 | Oakland Athletics optioned RHP Ryan Dull to Las Vegas Aviators. |
| 06/10/19 | Oakland Athletics signed OF Shane Selman. |
| 06/10/19 | Oakland Athletics recalled Tanner Anderson from Las Vegas Aviators. |
| 06/10/19 | Oakland Athletics signed RHP Colin Peluse. |
| 06/10/19 | Oakland Athletics signed 2B Marty Bechina. |
| 06/10/19 | Oakland Athletics signed RHP Charles Hall. |
| 06/10/19 | Oakland Athletics signed LHP Kumar Nambiar. |
| 06/10/19 | Oakland Athletics signed RHP Chase Wheatcroft. |
| 06/10/19 | Oakland Athletics signed LHP David Leal. |
| 06/10/19 | Oakland Athletics signed CF Matthew Koehler. |
| 06/10/19 | Oakland Athletics signed SS Elvis Peralta. |
| 06/10/19 | Oakland Athletics signed RHP Trayson Kubo. |
| 06/10/19 | Oakland Athletics signed RHP Austin Wahl. |
| 06/10/19 | Oakland Athletics signed RHP Vince Coletti. |
| 06/10/19 | Oakland Athletics signed OF Josh Watson. |
| 06/10/19 | Oakland Athletics signed RHP Peyton Miller. |
| 06/10/19 | Oakland Athletics signed 1B Patrick McColl. |
| 06/10/19 | Oakland Athletics signed SS Jalen Greer. |
| 06/10/19 | Oakland Athletics signed C Kyle McCann. |
| 06/10/19 | Oakland Athletics signed CF Marcus Smith. |
| 06/10/19 | Oakland Athletics signed RHP Sam Romero. |
| 06/09/19 | Oakland Athletics placed C Nick Hundley on the 10-day injured list. back spasms. |
| 06/09/19 | Oakland Athletics optioned RHP Paul Blackburn to Las Vegas Aviators. |
| 06/08/19 | Oakland Athletics recalled Paul Blackburn from Las Vegas Aviators. |
| 06/08/19 | Oakland Athletics recalled Beau Taylor from Las Vegas Aviators. |
| 06/06/19 | Oakland Athletics optioned RHP Daniel Mengden to Las Vegas Aviators. |
| 06/06/19 | Oakland Athletics recalled Ryan Dull from Las Vegas Aviators. |
| 06/01/19 | Oakland Athletics optioned RF Skye Bolt to Las Vegas Aviators. |
| 06/01/19 | Oakland Athletics activated LF Khris Davis from the 10-day injured list. |