Each of these pieces shows a single aggregate measure for each player rather than individual batted ball data. Rotowire also reports hard hit rate for prospects. Plus, Prospects Live reports average fly ball distance on virtually all prospects. There is hardly even average exit velocity data for each player, though excitingly, FanGraphs and Baseball America have started reporting it for the top 100-ish prospects. The expected outcome of a similar batted ball, in this case a screaming line drive, is quite good.Īt the minor league level, on the other hand, there is no publicly available exit velocity or launch angle data on each batted ball. Hit a screaming 95 MPH line drive right at the shortstop? Instead of a boring out, xwOBA credits you for the outcome that event typically produces.
Why is it called the bastard son, after all, and not the beloved son? (Besides my desire to not upset the MLBAM statistics department by tarnishing their vastly superior xwOBA metric by association).Īt the MLB level, xwOBA captures a hitter’s expected performance based on the exit velocity and launch angle of each of their individual batted balls. Having introduced the r’aison d’etre of this piece, perhaps stirring excitement in the reader, or perhaps a sense of dread, I shall now do my best critique of the bastard son of xwOBA. Jump to the bottom for xwOBA-lites for the great majority of full season minor leaguers. I can now say I’ve found an answer I am sort of at peace with: the bastard son of xwOBA, or, xwOBA-lite for minor leaguers. Find some of my recent explorations on the subject here and here. How to best make sense of the recent proliferation of information on minor league hitters, specifically power metrics? This is a question I’ve been struggling with in the last few weeks/months (does anyone keep track of time anymore?) regarding minor league fly ball distance, exit velocity, and exit velocity on fly balls.
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