Richard Seymour: Peyton will give Raiders’ D sleepless nights

Richard Seymour is a veteran of many battles with Peyton Manning during the years when Patriots-Colts was the NFL’s best annual rivalry. Now Seymour will prepare to face Manning twice a year when the Raiders play the Broncos. Seymour joked to NFL Network’s Steve Wyche that he’s going to have a hard time sleeping thinking…