Harbaugh provides update on Reid, Davis concussions
Vernon Davis and Eric Reid must pass a contact simulation in order to be cleared for Sunday's game. (COMCAST SPORTSNET)
SANTA CLARA -- Tight end Vernon Davis and safety Eric Reid remained limited at the 49ers' final practice before leaving Friday to face the New Orleans Saints.
Both Davis and Reid still must pass the final test of the NFL's concussion protocol, a contact simulation, in order to be cleared to play in Sunday's game. Davis and Reid were removed from the 49ers' game Sunday against the Carolina Panthers due to concussions.
Wide receiver Michael Crabtree, who remains on the reserve/physically unable to perform list, returned to practice after missing workouts Wednesday and Thursday. Crabtree is returning from surgery in May to repair a torn Achilles tendon.
The 49ers have one open roster spot that they could fill prior to Sunday's game. The most likely candidate to be promoted to the 53-man roster is practice-squad tight end Derek Carrier. Third tight end Garrett Celek is not expected to be available against the Saints due to a hamstring strain.
Also, defensive end Ray McDonald appears unlikely to play in Sunday's game after sustaining a high ankle sprain against the Panthers.