Notre Dame quarterback Tommy Rees left Saturday's game against USC and is currently being evaluated for a concussion after getting hit hard on a sack in the third quarter.
Rees was injured on a hit by linebacker Lamar Dawson. The Irish signal-caller dropped back and unsuccessfully tried to evade Dawson, who wrapped Rees up around the neck area and drove the back of his head and neck into the Notre Dame Stadium turf.
The team's medical staff evaluated Rees for a couple of minutes on the field, but he left under his own power, per Brian Hamilton of the Chicago Tribune:
Tommy Rees walking off the field under his own power with a phalanx of #NotreDame medical staff. Head is down on sideline.— Brian Hamilton (@ChiTribHamilton) October 20, 2013