Athletics Roster & Staff
Transactions
| Date | Transaction |
| 07/30/18 | Oakland Athletics optioned RHP Frankie Montas to Nashville Sounds. |
| 07/30/18 | Oakland Athletics recalled Ryan Dull from Nashville Sounds. |
| 07/29/18 | Oakland Athletics placed LF Chad Pinder on the 10-day disabled list retroactive to July 28, 2018. Left elbow laceration. |
| 07/29/18 | Oakland Athletics recalled Franklin Barreto from Nashville Sounds. |
| 07/24/18 | Oakland Athletics signed free agent OF Nick Osborne to a minor league contract. |
| 07/24/18 | Oakland Athletics sent CF Boog Powell on a rehab assignment to Nashville Sounds. |
| 07/24/18 | Oakland Athletics recalled Frankie Montas from Nashville Sounds. |
| 07/24/18 | Oakland Athletics optioned 2B Franklin Barreto to Nashville Sounds. |
| 07/22/18 | Oakland Athletics activated RHP Jeurys Familia. |
| 07/22/18 | Oakland Athletics optioned LHP Jeremy Bleich to Nashville Sounds. |
| 07/21/18 | New York Mets traded RHP Jeurys Familia to Oakland Athletics for RHP Bobby Wahl, 3B Will Toffey and Future Considerations. |
| 07/21/18 | New York Mets traded RHP Jeurys Familia to Oakland Athletics for RHP Bobby Wahl, 3B Will Toffey and Future Considerations. |
| 07/21/18 | Oakland Athletics transferred RHP Daniel Gossett from the 10-day disabled list to the 60-day disabled list. Right elbow strain. |
| 07/21/18 | New York Mets traded RHP Jeurys Familia to Oakland Athletics for RHP Bobby Wahl, 3B Will Toffey and Future Considerations. |
| 07/19/18 | Oakland Athletics released RHP Santiago Casilla. |
| 07/14/18 | Oakland Athletics selected the contract of J.B. Wendelken from Nashville Sounds. |
| 07/14/18 | Oakland Athletics recalled Franklin Barreto from Nashville Sounds. |
| 07/14/18 | Oakland Athletics reassigned RHP Daniel Mengden to the minor leagues. |
| 07/14/18 | Oakland Athletics optioned RHP Daniel Mengden to Nashville Sounds. |
| 07/14/18 | Oakland Athletics optioned RHP Ryan Dull to Nashville Sounds. |
| 07/14/18 | Oakland Athletics designated RHP Santiago Casilla for assignment. |
| 07/13/18 | Oakland Athletics signed free agent RHP Luis Martinez to a minor league contract. |
| 07/13/18 | Oakland Athletics optioned Josh Lucas to Nashville Sounds. |
| 07/13/18 | Oakland Athletics signed free agent RHP Richard Guasch to a minor league contract. |
| 07/13/18 | Oakland Athletics selected the contract of Jeremy Bleich from Nashville Sounds. |
| 07/13/18 | Oakland Athletics transferred RHP Andrew Triggs from the 10-day disabled list to the 60-day disabled list. Right arm nerve irritation. |
| 07/13/18 | Oakland Athletics signed free agent SS Jose Escorche to a minor league contract. |
| 07/13/18 | Oakland Athletics signed free agent RHP Roger Rodriguez to a minor league contract. |
| 07/13/18 | Oakland Athletics signed free agent RHP Luis Carrasco to a minor league contract. |
| 07/13/18 | Oakland Athletics signed free agent RHP Jose Gonzalez to a minor league contract. |
| 07/12/18 | Oakland Athletics activated RHP Trevor Cahill from the 10-day disabled list. |
| 07/12/18 | Oakland Athletics optioned RHP Chris Bassitt to Nashville Sounds. |
| 07/10/18 | Oakland Athletics recalled Ryan Dull from Nashville Sounds. |
| 07/10/18 | Oakland Athletics optioned RHP Frankie Montas to Nashville Sounds. |
| 07/09/18 | Oakland Athletics signed free agent SS Ronny Santana to a minor league contract. |
| 07/09/18 | Oakland Athletics signed free agent RHP Adriel Gonzalez to a minor league contract. |
| 07/09/18 | Oakland Athletics signed free agent SS Nelson Beltran to a minor league contract. |
| 07/09/18 | Oakland Athletics signed free agent 3B Cristopher Cruz to a minor league contract. |
| 07/08/18 | Oakland Athletics activated LHP Brett Anderson from the 10-day disabled list. |
| 07/08/18 | Oakland Athletics placed RHP Paul Blackburn on the 10-day disabled list retroactive to July 7, 2018. Right elbow lateral epicondylitis. |
| 07/07/18 | Oakland Athletics placed LF Matt Joyce on the 10-day disabled list retroactive to July 5, 2018. Lumbar strain. |
| 07/07/18 | Oakland Athletics recalled Nick Martini from Nashville Sounds. |
| 07/07/18 | Oakland Athletics sent RHP Trevor Cahill on a rehab assignment to Nashville Sounds. |
| 07/06/18 | Oakland Athletics signed C JJ Schwarz. |
| 07/06/18 | Oakland Athletics signed RHP Joe DeMers. |
| 07/06/18 | Oakland Athletics sent RHP Daniel Mengden on a rehab assignment to Nashville Sounds. |
| 07/05/18 | Oakland Athletics signed free agent RHP Roberto Garza to a minor league contract. |
| 07/03/18 | Oakland Athletics activated 3B Matt Chapman from the 10-day injured list. |
| 07/03/18 | Oakland Athletics optioned 2B Franklin Barreto to Nashville Sounds. |
| 07/03/18 | Oakland Athletics signed free agent CF Brayan Buelvas to a minor league contract. |
| 07/02/18 | Oakland Athletics sent RHP Liam Hendriks outright to Nashville Sounds. |
| 07/02/18 | Oakland Athletics sent 3B Matt Chapman on a rehab assignment to Stockton Ports. |
| 07/02/18 | Oakland Athletics signed free agent C Marcos Betancourt to a minor league contract. |
| 07/02/18 | Oakland Athletics signed free agent LHP Gerald Garcia to a minor league contract. |
| 07/02/18 | Oakland Athletics signed free agent RHP Robin Vazquez to a minor league contract. |
| 07/02/18 | Oakland Athletics signed free agent OF Ramon Martinez to a minor league contract. |