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Thats actually pretty likely to regress, as is the BABIP (his BABIP in minors has been .300+ the last three years in the minors). Guys right now are swinging at balls and laying off of strikes. Some of this is thanks to his pitching saavy and his changeup. A lot of it is also luck.
While hes due for a hard regression, Fister is starting to look like a Major League pitcher capable of holding down a #4-5 spot in the rotation next year for pennies. His changeup looks like its for real.