Sports figure(s) involved: Dana Chatman
In 2007, after three-and-a-half seasons heading the LSU Lady Tigers basketball program, Dana "Pokey" Chatman found her meteoric rise come to a crashing halt amid allegations that she had been engaged in a sexual relationship with a former player. Chatman had led LSU to three consecutive Final Fours during her tenure as head coach, but apparently that wasn't enough to excuse her actions. She was given an ultimatum by the university: either leave or get fired. Pretty sure that's what they call getting stuck between a rock and a hard place.