The whirlwind of activity on the MLB trade market each summer not only sees contenders shore up their rosters for the stretch run, but also leads to a significant shuffling of the prospect landscape.

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.

Here is why that the Padres trading for Mason Miller left other teams in the MLB "pissed," which includes a certain prospect.