"UCLA has a great law program and I can't wait to get into it," said Williams during the game's live broadcast.
Afterwards, when asked what had changed for him throughout the week, Williams responded with "nothing."
"I just wasn't mentioning them," he said.
Williams said that the Bruins coaching staff, led by Jim Mora, played a large role in his decision.
"They have the most experience all around in the NCAA right now. They are great and they prepare you not just in football, but in becoming a man," he said.
Williams, who has also been keeping in contact with offensive line coach Adrian Klemm and linebackers coach Jeff Ulbrich, says he's been a silent commit for a while.
"I told them before my in-home visit," he said.
Williams, who says he's 100%, enjoyed getting to know other UCLA commits Zach Whitley, who flipped to the Bruins from Alabama yesterday, and Ainuu Taua. He's also been playing alongside his friend and fellow Bruin commit Jaleel Wadood.
"We don't really talk about stuff like that," said Williams of recruiting Lasley. "We try to get away from that type of stuff. We just have fun."
Williams says he's not sure if he will take any other visits.