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.

Mason Miller madę his debut with the Padres on Friday night after getting traded to San Diego from the Athletics.