http://www.cbc.ca/sports/basketball/...ck-injury.html

The injury is akin to whiplash commonly suffered in an autoaccident. Except in this case, it was jonas' neck and shoulders being contorted by gay's shoulder.

Its not a major injury, especially considering the specialist/therapists available to the raptors. No info whether he'll come back with only a handful of games left. Knowing the raptors, he probably wont.