The San Diego Padres have landed closer Mason Miller and left-handed starting pitcher JP Sears from the Athletics in a blockbuster trade deadline deal, the team announced Thursday. The return includes top shortstop prospect Leodalis De Vries, who ranked No. 3 on CBS Sports' midseason rankings.

The San Diego Padres pulled off a big trade when they acquired Mason Miller from the Athletics, but Mike Shildt didn't guarantee anything.

In a startling move that sends the game’s most dominant reliever across the state and to another league, the Athletics have agreed to trade Mason Miller to the San Diego Padres, perhaps signaling a greater revamp to come at Petco Park, according to a person with knowledge of the deal.