The San Diego Padres offloaded a huge package to land Mason Miller from the Athletics at the MLB trade deadline. It was the biggest deal of the deadline, and it stunned the baseball world, as A.J. Preller gave up top prospect Leo De Vries, ranked 3rd by MLB Pipeline at the time of the trade.

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

The San Diego Padres have acquired pitchers Mason Miller and JP Sears from the Athletics in exchange for shortstop Leodalis De Vries and three other players, bolstering their All-Star bullpen ahead of the MLB trade deadline.