This article is part of our Collette Calls series.Wednesday afternoon, Peter Gammons tweeted out the following tidbit about Justin Masterson:
Justin Masterson's change in 2-seam and 4-seam usage w/ backdoor and back foot sliders why LHHs are .146/.222/.195/.417— Peter Gammons (@pgammo) April 17, 2013
Shortly thereafter, Ken Rosenthal tweeted out something very similar to which I replied that Masterson had been using his slider more frequently to left-handed hitters than he had historically done according to his pitcher card at BrooksBaseball.net. This then sparked a civil discussion back and forth with Joe Sheehan about sample size.
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