Complex sentence: Another, similar case of the yips occurred with St. Louis Cardinals pitcher Rick Ankiel, who had early success as a pitcher until he suddenly lost his ability to throw strikes and began throwing an inordinate number of wild pitches.
Split into simpler sentences: Another, similar, case of the yips occurred with St. Louis Cardinals pitcher Rick Ankiel. Ankiel had early success as a pitcher until he suddenly lost his ability to throw strikes and began throwing an inordinate number of wild pitches.