Pitcher Over/Under Performers
I wanted to highlight Pitcher over and under performers. Naturally, Mike Podhorzer has already done that and more concisely and eloquently than I ever could. In conjunction to what he did (ERA vs. SIERA within this year), I wanted to look at pitchers’ skills and luck relative to last year.
By “skills” I mean K%-BB%, combined Contact% and SwStr%, GB/FB and IFFB%. These columns are in green.
By “luck” I mean BABIP, LOB% and HR/FB. These are in some emotional shade of red.
I took all the 2014 vs. 2013 differentials and z-scored them. I summed them up and presented them under column 3 (“SKILL”) and column 4 (“LUCK”). In short, these are not their skill and luck scores for 2014, but their change relative to 2013…in relation to how much everyone else from this list changed (50 IP qualifier).