Two very bad injuries have caught up with him. He can still find holes, but he's got very little lateral movement anymore. And with Reuben Foster back, it was questionable if he was even going to start.

Word is they tried to trade him, but he didn't like the team that the were going to trade him to, so they just released him instead. That suggests that they weren't going to get much for him anyway.

It sucks, because he could have ended up the second best defensive player the Niners ever had and would have been a Hall Of Famer, but those injuries fucked his career. It also sucks that now the only remnant of those three glory years is Joe Stalley. But it happens.