Russell is currently on an official visit to USC and made his pledge before the Trojans' game against Kansas.
"I just committed to USC," Russell said. "I committed because of the relationship I was able to build with coach (Bob) Cantu and coach (Kevin) O'Neill. Also, this visit has been a really good experience for me."
The senior expanded on his relationship with the USC coaching staff.
"I like that coach K.O. is a straight shooter," Russell said. "I know he'll tell me the truth no matter what. If I mess up, he'll tell me I messed up. He sees my potential and I really appreciate that.
"I like how straightforward coach Cantu is as well. I have a really good relationship with both of them."
Russell will head to Los Angeles with a handful of goals.
"I think whatever the teams needs me to do to win, I'll do," he said. "It's just a really good situation for me. My goals are to make the tournament, go as far as we can when we're there and compete to win the national championship."