The Tampa Bay Buccaneers didn't release the details of Charles Sims' injury when they announced his right ankle surgery, and the fact that he'd be out for 12-14 weeks, but we now have a few more. According to Adam Caplan, Dr. Robert Anderson will perform surgery on a detached peroneal tendon.
Caplan notes that the surgery is similar to a procedure Curt Schilling underwent in 2004. Presumably not the temporary sutures that allowed him to play immediately, but rather the long-term procedure he underwent subsequently and which has not prevented him from playing at a high level since then.
So there's the good news: Sims will be out 12 to 14 weeks and will miss the majority of this season, but he should not suffer any long-term injuries. Meanwhile, Bobby Rainey and Mike James should be adequate replacements as Doug Martin's primary backup, though replacing his presumed impact in the receiving game will be more difficult.