Buffalo Bills' Mario Williams runs a drill during NFL football practice in Orchard Park, N.Y., Wednesday, Sept. 5, 2012. (AP Photo/David Duprey)

Buffalo Bills' Mario Williams runs a drill during NFL football practice in Orchard Park, N.Y., Wednesday, Sept. 5, 2012. (AP Photo/David Duprey)

Buffalo Bills' Mario Williams runs a pass blocking drill during NFL football practice in Orchard Park, N.Y., Wednesday, Sept. 5, 2012. (AP Photo/David Duprey)

Buffalo Bills' Mario Williams (94) talks with teammate Kyle Williams (95) during NFL football practice in Orchard Park, N.Y., Wednesday, Sept. 5, 2012. (AP Photo/David Duprey)

Buffalo Bills' Mario Williams stretches during NFL football practice in Orchard Park, N.Y., Wednesday, Sept. 5, 2012. (AP Photo/David Duprey)