Athletics Roster & Staff
Transactions
| Date | Transaction |
| 03/31/18 | St. Louis Cardinals traded RHP Josh Lucas to Oakland Athletics for RHP Casey Meisner. |
| 03/31/18 | St. Louis Cardinals traded RHP Josh Lucas to Oakland Athletics for RHP Casey Meisner. |
| 03/31/18 | Oakland Athletics optioned RHP Josh Lucas to Nashville Sounds. |
| 03/28/18 | Oakland Athletics optioned 1B Mark Canha to Nashville Sounds. |
| 03/28/18 | Oakland Athletics optioned RHP Frankie Montas to Nashville Sounds. |
| 03/28/18 | Oakland Athletics placed C Josh Phegley on the 10-day disabled list retroactive to March 26, 2018. Fractured fourth and fifth fingers on right hand. |
| 03/28/18 | Oakland Athletics placed RHP Ryan Dull on the 10-day disabled list retroactive to March 26, 2018. Strained right shoulder. |
| 03/28/18 | Oakland Athletics optioned CF Dustin Fowler to Nashville Sounds. |
| 03/28/18 | Oakland Athletics placed LF Renato Nunez on the 10-day disabled list retroactive to March 26, 2018. Strained left hamstring. |
| 03/28/18 | Oakland Athletics optioned SS Franklin Barreto to Nashville Sounds. |
| 03/28/18 | Oakland Athletics placed RHP Paul Blackburn on the 10-day disabled list retroactive to March 26, 2018. Strained right forearm. |
| 03/28/18 | Oakland Athletics optioned RHP Trevor Cahill to Nashville Sounds. |
| 03/28/18 | Oakland Athletics sent Raul Alcantara outright to Nashville Sounds. |
| 03/28/18 | Oakland Athletics transferred RHP Paul Blackburn from the 10-day disabled list to the 60-day disabled list. Strained right forearm. |
| 03/27/18 | Oakland Athletics signed free agent 2B Brallan Perez to a minor league contract. |
| 03/24/18 | OF Seth Brown assigned to Oakland Athletics. |
| 03/24/18 | C Jonah Heim assigned to Oakland Athletics. |
| 03/23/18 | C Collin Theroux assigned to Oakland Athletics. |
| 03/22/18 | Oakland Athletics optioned C Dustin Garneau to Nashville Sounds. |
| 03/22/18 | OF Luke Persico assigned to Oakland Athletics. |
| 03/21/18 | SS Richie Martin assigned to Oakland Athletics. |
| 03/20/18 | RF Anthony Churlin assigned to Oakland Athletics. |
| 03/20/18 | RHP Argenis Blanco assigned to Oakland Athletics. |
| 03/20/18 | 3B Mikey White assigned to Oakland Athletics. |
| 03/20/18 | Oakland Athletics signed free agent LHP Brett Anderson to a minor league contract. |
| 03/20/18 | RHP Joseph Camacho assigned to Oakland Athletics. |
| 03/19/18 | RHP Trey Cochran-Gill assigned to Oakland Athletics. |
| 03/19/18 | Oakland Athletics placed RHP Jharel Cotton on the 60-day disabled list. Right ulnar collateral ligament strain. |
| 03/19/18 | Oakland Athletics signed free agent Trevor Cahill. |
| 03/19/18 | RHP Joey Wagman assigned to Oakland Athletics. |
| 03/19/18 | LHP Andrew Tomasovich assigned to Oakland Athletics. |
| 03/18/18 | CF Austin Beck assigned to Oakland Athletics. |
| 03/18/18 | RF J.P. Sportman assigned to Oakland Athletics. |
| 03/18/18 | RHP Norge Ruiz assigned to Oakland Athletics. |
| 03/18/18 | Oakland Athletics optioned RHP Chris Bassitt to Nashville Sounds. |
| 03/17/18 | C Jarrett Costa assigned to Oakland Athletics. |
| 03/17/18 | SS Alexander Campos assigned to Oakland Athletics. |
| 03/17/18 | LF Brett Vertigan assigned to Oakland Athletics. |
| 03/17/18 | OF Logan Farrar assigned to Oakland Athletics. |
| 03/17/18 | OF James Terrell assigned to Oakland Athletics. |
| 03/17/18 | SS Jesus Lage assigned to Oakland Athletics. |
| 03/17/18 | LHP Josh Reagan assigned to Oakland Athletics. |
| 03/17/18 | RHP Kris Hall assigned to Oakland Athletics. |
| 03/17/18 | 2B Nate Mondou assigned to Oakland Athletics. |
| 03/17/18 | C Skyler Weber assigned to Oakland Athletics. |
| 03/15/18 | RHP Jake Sanchez assigned to Oakland Athletics. |
| 03/15/18 | IF Jordan Tarsovich assigned to Oakland Athletics. |
| 03/15/18 | OF Skye Bolt assigned to Oakland Athletics. |
| 03/14/18 | Oakland Athletics optioned Jorge Mateo to Nashville Sounds. |
| 03/14/18 | Oakland Athletics released LHP Jairo Labourt. |
| 03/13/18 | Oakland Athletics optioned OF Ramon Laureano to Nashville Sounds. |
| 03/13/18 | IF Melvin Mercedes assigned to Oakland Athletics. |
| 03/13/18 | OF Tyler Marincov assigned to Oakland Athletics. |
| 03/12/18 | Oakland Athletics optioned RHP Lou Trivino to Nashville Sounds. |
| 03/12/18 | Oakland Athletics signed free agent C Jonathan Lucroy. |
| 03/12/18 | Oakland Athletics designated LHP Jairo Labourt for assignment. |
| 03/12/18 | Oakland Athletics optioned LHP Jairo Labourt to Nashville Sounds. |
| 03/08/18 | RHP John Gorman assigned to Oakland Athletics. |
| 03/07/18 | RHP J.B. Wendelken assigned to Oakland Athletics. |
| 03/06/18 | RHP Jake Bray assigned to Oakland Athletics. |
| 03/06/18 | Oakland Athletics released DH Brandon Moss. |
| 03/06/18 | LF Lazaro Armenteros assigned to Oakland Athletics. |
| 03/04/18 | Oakland Athletics claimed Jairo Labourt off waivers from Cincinnati Reds. |
| 03/04/18 | Oakland Athletics designated DH Brandon Moss for assignment. |
| 03/01/18 | Danny Coulombe changed number to . |
| 03/01/18 | RHP Sam Bragg assigned to Oakland Athletics. |