Balk to Second

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Anybody see the Oklahoma/Oklahoma St. game on ESPN yesterday? Appears THEY called a balk to second. I thought from the chatter here that calling a balk to second was a near impossibility.

Apparently, according to the announcers, the pitchers entire foot did not "clear the rubber" on his spin to second, thus the balk, although from the angles show on the replays, his foot planted behind the rubber on his spin to second (maybe not the tip of his heal???).

Any comments on the call?