Bama's Greg McElroy suffered head injury against Florida

In the Tide's impressive 31-6 win over Florida in week five, McElroy suffered a head injury in the second quarter.
"He got hit in the head when he scrambled once, he got hit on the sidelines and it really affected him in the game, I think. We didn't know it until the fourth quarter when he called the play wrong on the formation wrong, then tried to run the play that we signaled," said Nick Saban.
According to the head coach, McElroy's poised demeanor hid the symptoms of his injury.
"He's actually so poised and so good, he got hurt really in the second quarter and nobody knew it."
In the 2010 National Championship, McElroy suffered a
pair of broken ribs, but played the entire game.