Starting with Oklahoma, Williams transferred to the University of Southern California (USC) and easily won the Heisman Trophy as college football's best player in his first year at USC in 2022.
The team struggled more last year, but Williams still shone through as not only one of the best dual-threat quarterbacks but also one that just does not give the ball away.
Williams totalled 10,082 passing yards and 93 touchdowns in his three years at college - throwing just 14 interceptions - along with 960 rushing yards and 27 touchdowns on the ground.
Williams is one of the most marketable sports stars in the USA - without even playing in the NFL yet. Even in college he reportedly earned up to $10m (£8m), external in endorsement deals.
Always one to do it his way, he has his own style - such as his pink phone case and painted fingernails while watching the women's NCAA basketball tournament.
A video of Williams crying with his mother after USC lost to Washington last year also went viral - something he later used as part of his advocacy for mental health.
The Bears have won nine NFL Championships - although just one of those was a Super Bowl - have won the second-highest number of games in NFL history and have the most players inducted into the Hall of Fame.