Calvin is a crafty lefty who can effectively throw multiple pitches for strikes and can locate in all quadrants on the plate. Calvin does a great job of getting soft contact early in at bats and letting his defense do work for him. Calvin has a great tempo when he pitches, owning the mound and commanding the pace of the play. Calvin also does a solid job of fielding his position and making plays off the mound and helping to get outs in the bunt game. Calvin holds runners very well and slows down the running game of other teams. Calvin's ability to get quick outs and keep his pitch count down allows him the ability to work deep into games. Calvin is dynamic is his ability to both start and come in as a relief pitcher. Calvin is effective in both roles and is willing to handle any role that is given to him. Calvin is also a student of the game and picks up tendencies of hitters and gains an understanding of how to attack hitters. Calvin also takes the necessary time to improve his mechanics and strengthen his body.