RJ is such a moron. He opted out of what, a 15+ million contract thinking he'd get more. Then no one bit and now San Antonio came back and said "We'll give you 5 million".
LOL!
I don't think he's an idiot; he just got some bad advice. Most people who pull this move (Baron Davis and Paul Pierce come to mind) were vital to their team's past success. If they didn't sign elsewhere for more money, they always had that fallback of going back to their old club.
Richard Jefferson, while physically still near his peak, had career low statistics last year. On top of that, since the Spurs didn't really want him back, he was operating without a safety net. It was a calculated risk, but a guy like him (who's banked $67m over his career) can afford to take it.
I mean shit, Joe Johnson got $120m. Other scrubs are getting $40-60m contracts. With so many teams possessing so much cap space, there was no reason for RJ to think he couldn't get a piece of that.