Detroit Tigers reliever Tyler Mattison — an underrated prospect — throws a mid-90s fastball and a hard low-80s curveball from ...

Cleveland’s James Karinchak rounds out the top five after notching a 2.67 ERA with a 17.7 K/9 rate in 27 frames as a rookie. He’s the favorite to take over as Cleveland’s closer with Brad Hand (No. 6 ...