Wow, had never heard of him before but yea definitely heard of a few cases of this. I knew about Ankiel but had forgotten all about Daniel Bard, man his downfall was swift and painful.
Mark Wohlers had it too. I remember seeing him pitching a game in AAA when he was trying to make it back. It was tough to watch - he really did look like he was about to cry out there - but he eventually made it back to the majors, albeit never being what he was before.