Executive vice president John Paxson said in a statement: "Decisions like this one are never easy to make".
The injuries and the Bulls' young roster combined to doom the Bulls to a 5-19 start this season, the third-worst record in the National Basketball Association.
The Bulls are now on a six-game losing streak and have only won one of their last 10 games.
Shang-Chi Movie Developing at Marvel Studios with Asian Lead
Callaham has had a hand in co-writing Wonder Woman 1984 , and he's now at work on a sequel to Spider-Man: Into the Spider-Verse. No actor or director is now attached to the project, though reports say that Marvel is looking at Asians and Asian-Americans.
Before his Bulls stint, Hoiberg coached five seasons at Iowa State, leading the Cyclones to the Sweet 16 in 2014.
In a March 21, 2018, file image, Chicago Bulls head coach Fred Hoiberg mans the bench against the Denver Nuggets at the United Center in Chicago. After a thorough evaluation, I elected to make this move with the overall development of our team in mind.
As a senior that season, Boylen was the runner-up to the late Reggie Lewis, who was drafted by the Boston Celtics, as the conference player of the year. According to one source, Hoiberg believed he would have the chance to coach a fully healthy team before being evaluated, which the Sun-Times reported Sunday. "And I think eventually, everybody was like, 'Yo, they're either going to build the team around Jimmy, or they're going to go the route with Fred, the up-and-down, shoot a lot of threes (style)". In more than three seasons, the Bulls were 115-155 under Hoiberg.
The Bulls signed Hoiberg in 2015 to a five-year, $25 million contract. When the Bulls hired Hoiberg in 2015, it was a move that put emphasis on youth movement.