Same Masterson, Different Results
Based on traditional metrics like wins, losses, and ERA, Justin Masterson has been a below-average starting pitcher during the past two seasons. With a 10-23 record, and an ERA above 4.50, the former prospect looked like a superficial candidate for the label of “bust”. But defensive independent metrics suggested Masterson was a quality starter — who struggled shaking the luck dragons known as left-on base percentage (LOB%) and batting average on balls in play (BABIP).
In 2009 and 2010, the right-hander’s average on balls in play was roughly 25% more than the league average, which came despite a fantastic groundball rate. It certainly did not help that most of those groundballs came in front of the second worst defense in the league during the same period. With an increased amount of balls finding holes, his strand rate fell about 6% below the average of his peers.
