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					Originally Posted by  UMP25
					 
				 
				No it's not, and I hope you don't subscribe to the mythical 45* angle all too erroneously assumed to exist. 
			
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 NCAA 9-1a  (which refers to the windup)
(6) 
The pitcher must step directly and gain ground toward a base in an attempt to pick off a runner. “Directly” is interpreted to mean within a 45-degree angle measuring from the pivot foot toward the base the pitcher is throwing to or feinting a throw.
NCAA 9-1c:
c.   At  any time during the pitcher’s preliminary movements and until the natural pitching motion begins, the pitcher may throw to any base provided a step that gains ground and is directed toward such base is taken before making the throw (see 9-1-a-[6]).