No. 5: Mason Miller, Oakland Athletics
Oakland Athletics closer Mason Miller is by far one of the most intriguing names floated as a trade possibility this season. Recently named to his first All-Star team, the 25-year-old flamethrower has been one of the lone bright spots on a terrible Athletics team with no chance of making a playoff run.
Miller made his MLB debut last season for the A's, and in 10 appearances (six starts), he went 0-3 with a 3.78 ERA and 38 strikeouts in 33 1/3 innings pitched. Entering this season in the Athletics bullpen, the right-hander has emerged as one of the top closers in the game. Using his filthy stuff, he has secured 15 saves in 17 save opportunities while recording an ERA of 2.33 and 68 strikeouts in 38 2/3 innings.
Plenty of MLB teams are going to inquire about Miller, but it's not known if the A's are currently listening to offers on the talented youngster. Either way, the cost of acquiring Miller will likely be steep as he won't be a free agent until after the 2030 season. The Phillies have the prospects to get a deal done, but they probably say no to a Miller deal.