Dallas Cowboy QB Drew Bledsoe had a mild concussion?

Thanks to RCowboy fan for a sports forum:

I heard he got some kind of mild concussion most likely, according to Jerry Jones, at least that was said on here locally on ESPN radio.If so, I guess that might be the reason Bledsoe played bad 2nd quarter onwards. He missed quite a few wide open recievers even when he had time. You could see he had quite of options several times when you watch live in stadium.