CHICAGO – The reeling Chicago Blackhawks fired coach Jeremy Colliton on Saturday, dismissing the former NHL forward with the team off to a rough start in his fourth season. Colliton, who turns 37 in January, was in the first year of a two-year contract extension. Derek King was promoted from Rockford of the American Hockey League, replacing Colliton on an interim basis. Colliton went 87-92-26 with Chicago. He was dismissed exactly three years after he got the job. Assistant coaches Tomas Mitell and Sheldon Brookbank also were let go. The team said assistants Marc Crawford, Jimmy Waite, Matt Meacham and Dylan Crawford will remain in their current positions, and Chris Kunitz will stay on as a player development advisor. The coaching change is the latest chapter in a rough stretch for what was once regarded as one of the NHL’s marquee franchises. The Blackhawks published a report on Oct. 26 that showed senior leaders with the organization largely ignored allegations that assistant