San Diego shockingly acquired 100-mph flamethrower Mason Miller from the A’s on Thursday in a massive move ahead of the MLB trade deadline, The Post’s Jon Heyman confirmed. San Diego is also receiving former Yankee lefty JP Sears, while the A’s are receiving four players, including the No. 3 prospect in the sport in shortstop Leo De Vries.

San Diego Padres general manager AJ Preller is reportedly being very aggressive before the 5 PM ET deadline. The Athletic MLB insider Ken Rosenthal fully “anticipates” the Pads to make a major move on Thursday due to Preller’s proven track record.

According to numerous reports, utility player Willi Castro is also likely to be moved today. Castro has slashed .247/.338/.411 this season, along with 15 doubles, a pair of triples, ten homers, 27 RBI, and nine stolen bases.