Emmanuel Sanders is headed to the locker room with 10:07 remaining in the second quarter.
The 49ers report the receiver is being checked for a rib injury and list him as questionable to return.
Sanders has two catches for 24 yards, but the injury came on an incompletion. Sanders appeared to grab at his side before Jamar Taylor even grazed him.
UPDATE 10:20 P.M. ET: The 49ers have ruled out Sanders, Jones and linebacker Azeez Al-Shaair (concussion). Richburg returned to action.