As a true freshman in 2012, Williams started nine of 13 games at defensive tackle, recording 64 tackles, eight sacks and an interception.
He was named the Pac-12 Defensive Freshman of the Year.
As a sophomore in 2013, Williams was moved from tackle to defensive end.
After recording 74 tackles and six sacks, Williams was a named a first-team All-Pac-12 selection and was an All-American by ESPN.
As a junior in 2014, he recorded 80 tackles and seven sacks.
He was named Team MVP, first team All-Pac-12 and was an All-American by the American Football Coaches Association (AFCA) and ESPN.

After his junior season, Williams announced that he would forgo his senior year and enter the 2015 NFL Draft.
As a true freshman in 2012, Williams started nine of 13 games at defensive tackle, recording 64 tackles, eight sacks and an interception. He was named the Pac-12 Defensive Freshman of the Year. As a sophomore in 2013, Williams was moved from tackle to defensive end. After recording 74 tackles and six sacks, Williams was a named a first-team All-Pac-12 selection and was an All-American by ESPN. As a junior in 2014, he recorded 80 tackles and seven sacks. He was named Team MVP, first team All-Pac-12 and was an All-American by the American Football Coaches Association (AFCA) and ESPN.
After his junior season, Williams announced that he would forgo his senior year and enter the 2015 NFL Draft.
Leonard Williams (American football)