This article was originally published on www.si.com/mlb/padres as Padres Named Big Winner of MLB Trade Deadline After Shocking Moves. The San Diego Padres had a sensational trade deadline.

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.

THE PADRES AND GM A.J. PRELLER  A.J. Preller led off our list of the MLB's biggest deadline winners and losers. The Padres' veteran GM was a slam dunk deadline winner after acquiring former Athletics closer Mason Miller (and lefty JP Spears) for four prospects that includes Leo De Vries,