SANTA CLARA, Calif. -- As expected, star tight end Vernon Davis and rookie safety Eric Reid practiced on a limited basis Wednesday.Both were wearing non-contact jerseys after suffering concussions in a loss against Carolina. Both players were symptom free Wednesday, but will have to continue to pass league concussion protocols before being cleared to play Sunday at New Orleans. Both appear to be on track, however.It does not look like defensive tackle Ray McDonald is going to play Sunday.