Frost and the Athletics pulled the trigger for the Miller trade thanks to Leo De Vries' inclusion in the trade. Without him, the Athletics likely wouldn't have been interested in a Miller trade.

This article was originally published on www.si.com/mlb/padres as Padres Could Shift Mason Miller to Starting Pitcher. The San Diego Padres traded a massive prospect package to acquire relief pitcher Mason Miller, a true flame-throwing arm.

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.