Colin Kaepernick is dealing with some shoulder soreness as a result of "arm fatique," according to Chip Kelly.

Kaepernick will be limited in practice on Friday after taking Thursday off, but the San Francisco 49ers are hopefully that he'll play in the preseason opener on Sunday.

"Just getting him back up to throwing every day. That's why we had planned on actually taking yesterday off," Kelly said. "We knew that going in, he didn't throw during the spring full, because of coming off of it (surgery) so it's just trying to get his arm back up to where we can just use him every day. If we've got to take a day off in between, it's not a real big deal."