Padres president of baseball operations A.J. Preller began his trade deadline maneuvers by sending top prospect Leo De Vries and multiple pitching prospects to the Athletics for closer Mason Miller and starting pitcher JP Sears. A source confirmed the pieces in the trade, which was first reported by ESPN.

Cost to acquire one of baseball’s best relievers is high; more high-profile trades expected, as Padres seek offensive upgrade in left field and at catcher

JP Sears is also headed to San Diego while De Vries, fellow top prospect Braden Nett and two others go to the A's.