During spring training, Trevor Rosenthal was given a shot to make the St. Louis Cardinals roster as a starting pitcher. The 22 year old, former 21st round draft pick, was originally groomed to be a starter before breaking on to the scene as a hard-throwing reliever with the Cardinals in 2012.
After it looked as though the Cardinals had other options in Shelby Miller and Joe Kelly, manager Mike Matheny made the decision to move Rosenthal to the bullpen and utilize his ability to throw 100 mph fastballs in late-inning situations.
Rosenthal did exactly that on Tuesday night in his season debut, pumping in two pitches at 100 mph while dominating helpless Arizona Diamondback hitters.
Rosenthal tossed a perfect eighth inning, throwing just nine of his 13 pitches for strikes and struck out two Arizona hitters.
Rosenthal now will be the eighth inning man as the Cardinals' regular set-up man Mitchell Boggs fills the closer's role in Jason Motte's absence.