Doug Fister of the Detroit Tigers ranks as one of the best pitchers in 2011 at getting batters to chase pitches outside the strike zone. This should be a good thing; batters swinging at pitches out of the strike zone should result in better outcomes for the pitcher. Take a look at the batting averages allowed by the top ten pitchers in chase percentage.
|Pitcher||Team||Plate Appearances||AVG Against||Strikeout %||Chase %|
Note that the batting averages allowed correlate much better with strike out rate than with chase percentage. Chasing pitches without inducing misses doesn't really seem to lead to better outcomes. Balls in play tend to find holes with some regularity.
Note that Fister posted a .252 BA against with the Mariners, a good fielding team. With the poor fielding Detroit Tigers, that's up to .369. He doesn't miss bats, so even though he's good at getting hitters to fish outside the strike zone, those balls in play still depend on his fielders catching them. So far, the Tigers haven't.