The Padres have made a big splash, picking up closer Mason Miller ahead of the MLB trade deadline from the Athletics.

The San Diego Padres and Athletics agreed to a blockbuster deal on Thursday, hours before Major League Baseball's July 31 trade deadline passed (6 p.m. ET). The Padres will add All-Star right-hander Mason Miller and veteran lefty JP Sears to their pitching staff in exchange for a package fronted by shortstop prospect Leo De Vries.

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.