Wagner was one of six players to average over 10 tackles per game in the second half of the 2013 season. ... Mayo is one of the five most important players on the Patriots' roster. He and Jamie Collins will be a versatile three-down tag team, capable of hanging with tight ends and scat backs. ... Burfict led the NFL in tackles, taking over as the backbone of the Bengals' defense when Geno Atkins when down with an ACL injury. ... Levy is coming off a breakout season, leading all linebackers with six interceptions while pitching in 15 pass breakups.