See now I'm confused. Because it sounds like Brown led with the head but didn't hit the QB in the head, so it wasn't targeting. Complete opposite happened late in the Indiana/Michigan State game. Michigan State defender led with the crown of the helmet and hit the QB square in the sternum, no where near the head, yet he was ejected. What's the rule?
According to the American Football Coaches Assn., targeting can be called if a player leads with the crown of the helmet (anything above the facemask) when tackling a player, no matter where the contact occurs. Also, any hit to the neck or head of a defenseless player is targeting. Here's the rule:
Targeting and Initiating Contact With the Crown of the Helmet (Rule 9-1-3)
No player shall target and initiate contact against an opponent with the crown (top) of his helmet. When in question, it is a foul.
Targeting and Initiating Contact to Head or Neck Area of a Defenseless Player (Rule 9-1-4)
No player shall target and initiate contact to the head or neck area of a defenseless opponent with the helmet, forearm, fist, elbow or shoulder. When in question, it is a foul. (Rule 2-27-14)
More info can be found here:
http://www.afca.com/article/article.php?id=2342 I haven't seen the play since Saturday (ESPN shows Martin's tirade, but not the play that caused it and I haven't gone back through the entire broadcast), but as I remember it Blair didn't lead with the crown of his helmet. I don't remember it as being a late hit, either. The only call made was for targeting, so once that was overturned, the flag was picked up.