that's a very rudimentary formula, and as i said before, lack of speed does not have anything to do with luck. if you were to gather up every catcher in baseball and evaluate their BABIPs versus their LD%, i'd be shocked if their differential were not significantly below .12. i'll choose brian mccann at random - and he's a relatively thin and young guy, so i'm being generous to your side: 2007: .094 2008: .102 2009: .089 2010: .095 2011: .107