On January 12, 2015, one day after the divisional playoff loss to the Colts, the Broncos and head coach John Fox mutually agreed to part ways. Fox left the Broncos with a .719 winning percentage in his four seasons as the Broncos' head coach—the highest in franchise history. One week later, the Broncos hired Gary Kubiak as the team's 15th head coach. Kubiak served as a backup quarterback to executive vice president/general manager John Elway from 1983 to 1991, as well as the Broncos' offensive coordinator from 1995 to 2005. Shortly after Kubiak became head coach, the Broncos underwent numerous changes to their coaching staff and players, including the hiring of defensive coordinator, defensive mastermind Wade Phillips, under whom the Broncos' defense went from middle of the road to being ranked No. 1 in the NFL and is one of the Greatest NFL Defenses of All Time along with the 1985 Bears, 2000 Ravens and 2002 Buccaneers during the 2015 season. The Broncos finished with a 12–4 record and the AFC's No. 1 seed, despite Peyton Manning having his worst statistical season since his rookie year with the Indianapolis Colts in and backup quarterback Brock Osweiler starting the last six games of the regular season due to Manning suffering from a foot injury. Manning led the Broncos throughout the playoffs. The Broncos defeated the Pittsburgh Steelers 23–16 in the Divisional Round, the New England Patriots 20–18 in the AFC Championship, and defeated the Carolina Panthers 24–10 in Super Bowl 50—the Broncos' third Super Bowl title.