Raiders TE Mayer ruled out after hit to the head

"During the final seconds of the quarter, Mayer was in the fencing position after he took a hit to the head while tackling wide receiver Jaylin Lane on a 25-yard punt return. Players on both sides kneeled while Mayer was on the ground being looked at by trainers. Eventually, Mayer walked off the field and headed to the locker room. He was listed as questionable before being ruled out at the start of the third quarter."

"In two seasons, Mayer -- a second-round pick -- had totaled 460 yards and two touchdowns on 48 catches. The former Notre Dame standout had just 21 catches for 156 as he was absent for seven weeks of last year due to personal reasons. The coaching staff had high hopes for Mayer going into his third season. He had a strong training camp and said this is the best he's felt from a mental and emotional standpoint."

Michael Mayer sustained a head injury in the first quarter while tackling a punt returner and went into a fencing position. Trainers attended to Mayer on the field while players from both teams kneeled, and Mayer ultimately walked to the locker room. He was initially listed as questionable and then ruled out at the start of the third quarter. Mayer has two NFL seasons with 460 yards and two touchdowns on 48 catches, missed seven weeks last year for personal reasons, and entered this season after a strong training camp and improved mental and emotional readiness.

Read at ESPN.com