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The home field scorer can severel deflect the defensive statistics by his own biases re: trajectories...after the 07 season it was observed that the Mariners led the universe in out of zone plays despite being among the worst defensive teams in baseball. A quick look revealed that they were having a lot of things called line drives (and thus attached to smaller zones) that other scorers might have called fly balls (you can tell this by looking at the team LD for and LD allowed stats...Seattle was an outlier high on both sides of the ball that year).