Ziggy concussion?

Ziggy Ansah left Detroit Lions practice today during stretching and walked to the locker room with a towel covering his head and two trainers in tow. On Saturday, in a non-padded practice, Ansah got hit hard by a block he did not appear to see coming from Leroy Harris. He pulled out immediately, spent a short time on one knee off on the side, and eventually returned to the field.

Hope he's OK. Hate to have concussions ruin his career