This is my problem with BABIP. Where a ball is hit to isn't a matter of pure 'luck,' so much as an excessive number of variables which seem random to the naked eye. The most obvious factor affecting BABIP is where the pitch crosses the plate; this is a factor that the pitcher has exclusive control over. In Parra's case, he leaves the fastball down the heart of the plate more often than most pitchers, so it makes logical sense that he gets cuffed around more with that pitch than the average pitcher. There are other factors as to how the pitch gets hit (whether the hitter is taking a pitch to work the count, the timing, recognition, & skill of the hitter, etc.), but if you throw bad pitches, you should expect to get hit around a bit more. If Parra is able to spot his fastball better, or pick up some movement on the pitch (a la Doug Davis' cutter), then his numbers should regress towards the mean. My opinion on the effectiveness of Petersen as Pitching Coach is going to be shaped considerably by how well Parra throws next year, for this very reason.