MLB Trade Deadline 2025: Instant Takeaways to Padres Landing Mason Miller originally appeared on Athlon Sports. The surging San Diego Padres entered the 2025 MLB trade deadline with three All-Star relievers already in their bullpen. They now have a fourth.

Preller brought flame-throwing closer Mason Miller along with starter J.P. Sears to San Diego in a deal with the A’s, trading away No. 3 overall prospect Leo De Vries and three other top-20 prospects in the Padres’ system.

By the time this year’s deadline passed, Preller had traded 14 players and acquired eight. Left-handers JP Sears and Nestor Cortes, first baseman Ryan O’Hearn and outfielder Ramón Laureano were among those the Padres landed in addition to Miller, an All-Star last season who is under team control through 2029.