21.   Aikman suffered a concussion in the season opener against Philadelphia and missed the next two weeks.

22.   Aikman has suffered numerous concussions.

23.   Aikman suffered a concussion on a sack Monday night, one of two hits he took behind the line.

24.   Al Toon, a wide receiver for the Jets, retired two seasons ago after suffering multiple concussions over his eight-year career.

25.   Aikman missed the last two games and parts of the two previous after suffering back-to-back concussions in Indianapolis and Minnesota.

26.   Aikman sat out two games last November after he suffered concussions in two consecutive weeks.

27.   Alex was a defensive back from Seattle, sidelined after suffering a concussion against Michigan in the second game.

28.   Also, cornerback Rashee Johnson is questionable after suffering a concussion in that game.

29.   Allen suffered a concussion during a third-quarter drive, giving rookie Kevin Faulk a chance at the end.

30.   Brown found out how badly at the All-Star Game, suffering a concussion as a result of the overhand right that Davis-Wrightsil delivered.