he led at halftime, 0–17 in games in which he trailed at halftime, 25–21 against Division I opponents, 15–18 against the Big 12, and coached the program its only two losing seasons (out of 4 seasons at Nebraska) in 46 years. Sports Illustrated named Callahan as the worst coaching hire of the decade in college football. Exacerbating Cornhusker fans' consternation with Bill Callahan's tenure at the university was his insistence that he had "done an excellent job in every area." New York Jets On January 18, 2008, Callahan was hired as assistant head coach of the New York Jets. On January 2, 2009 Callahan interviewed for the position of head coach of the New York Jets. In 2008, three of the offensive linemen (with Bill Callahan as their position coach) from the Jets were named to the Pro Bowl: Nick Mangold, Alan Faneca and D'Brickashaw Ferguson. All three repeated in 2009. Under Callahan's direction of the running game the Jets broke the franchise record in 2009 gaining 2756 yards on the ground through 16 regular season games. They led the National Football League in rushing and averaged 4.5 yards per attempt. For the 2009 season, Peter King named Callahan the assistant coach of the year. Dallas Cowboys The Dallas Cowboys hired Callahan as their offensive line coach during the 2012 offseason. On June 4, 2013, Dallas owner Jerry Jones announced that Callahan would call plays on offense during the upcoming 2013 season, allowing head coach Jason Garrett to focus on game-management. After being the offensive coordinator for the Cowboys during the 2013 season, he was stripped of his play calling duties. During the 2014 off-season, the Cleveland Browns and Baltimore Ravens both asked Dallas for permission to interview Callahan for their open offensive coordinator positions, but Dallas declined. Dallas let Callahan's contract as offensive line coach expire after the 2014-2015 season, allowing him to seek other opportunities. At the time, Callahan was considered among the best offensive line coaches in the NFL, and some considered him to be the leading reason behind the success of the Dallas Cowboys offensive line, which had 3 linemen (Tyron Smith, Zack Martin, and Travis Frederick) named to the 2014 All-Pro Team. Washington Redskins On January 15, 2015, the Washington Redskins hired Callahan as their offensive line coach. On March 15, 2017, Washington promoted Callahan to assistant head coach in addition to his offensive line