The linebacking corps continued its growth under Sheldon in 2008. In his first full season, Posluszny posted a team-high 129 tackles, along with an interception and a fumble recovery. Veteran Kawika Mitchell, whom the team signed as a free agent prior to the season, contributed 91 tackles, four sacks, two interceptions and 15 quarterback pressures. In 2009, Sheldon helped steer the Bills’ young linebacking corps through an injury-plagued season. Despite using nine different starters over the course of the year, Sheldon's linebackers helped Buffalo's defense finish second in the NFL in both pass defense (184.3 yards per game) and interceptions (28). With starters Mitchell and Keith Ellison lost for the year due to injuries in the first half of the season, the group was again led by Posluszny, who despite being limited by injury to 12 games outpaced his full 2008 season with a team-high 116 tackles, including six for losses. Posluszny flashed big-play potential, logging three interceptions, three forced fumbles, one sack and 12 quarterback pressures. With injuries taking a toll on his position group, Sheldon also helped convert strong safety Bryan Scott to linebacker, where in just nine games he totaled 54 tackles, two sacks and three quarterback pressures. Additionally, rookie Nic Harris contributed 25 tackles in just three games. Sheldon held several coaching positions on the Rams’ staff under head coach Mike Martz. Over Sheldon's five years in St. Louis, the Rams made the playoffs three times, including an appearance in Super Bowl XXXVI in the 2001 NFL season. His duties with the Rams varied from special teams to defensive backs to linebackers, including special assignments and research for offense, defense, special teams and head coaches Mike Martz and Joe Vitt. From 2001-03, Sheldon worked on the Rams’ defensive coaching staff under defensive coordinator Lovie Smith. The 2001 Rams defeated the Philadelphia Eagles in the NFC Championship Game and advanced to Super Bowl XXXVI, where they lost to the New England Patriots. The high-performing offense was led by 2001 NFL Most Valuable Player Kurt Warner and AP Offensive Player of the Year Marshall Faulk, among others. Martz employed an offensive philosophy based on the “Air Coryell” system, made famous in the 1970s and 80s by then-San Diego Chargers head coach Don Coryell. The defensive side, where Sheldon worked as defensive assistant / quality control coach, featured Hall of Fame cornerback Aeneas Williams, linebacker London Fletcher, and defensive ends Grant Wistrom and Leonard Little, among others.