In his first game since joining the Sooners, he led the team with 103 rushing yards on 10 carries, good for an average of 10.3 per rush.
A bulk of that came late in the fourth quarter when he blasted around the right edge and then sprinted up field and raced towards the end zone for his first score in a Crimson and Cream uniform.
Then, they got even bigger as wide receiver Kenny Stills eliminated a DB with a shed block.
"I was like, ‘Oh yeah. I know I'm going all the way," Williams said. "So, I just took it all the way."
And didn't let up until he crossed the goal line for the first time at OU.
So, how was that?
"You know, it felt great," Williams said. "I was getting them hard yards, banging five, four yards and then actually for everything to open up, I just had to use my speed and whatever I had in me just to get it all the way. But when I got to the end zone, it felt great. You know, I had all my guys coming to me and jumping on me. So, it felt great."
He admitted it's something he's thought about the whole summer and fall camp: when would he get there for the first time.
"Yes, you know I didn't know if it was going to be this game, next week or [when]," Williams said. "But I'm glad it happened this game, so I can get all the first touchdown thing out the way. But, you know, after this it's just gonna be a regular thing."
Not only did he get that out of the way, but in the process he showed he's a gamer and worthy of all the praise that's come his way throughout fall camp.
"I'm in practice with him every day," said running backs coach Cale Gundy. "I know he can do that, so yeah, I mean, he's a good player...He's been going through scrimmages and I know how fast he is. I've watched a lot of film on him, and I've seen him go against our guys in practice every day. I know how good he can be."
Now, Sooner Nation does as well."Obviously you guys saw flashes of the kind of running back he can be, he's just a real powerful guy," said center Gabe Ikard. "You know, but then again he's got a little speed to him. He broke out on the run, so he's gonna take a lot. He's gonna get a lot of carries for us and we'll need him to perform at a high level and that's what he's been doing throughout camp."
If he does that, he'll continue to be a major part of the OU offense.
And fans will continue to see him race downfield for scores.
"It's really good to watch someone just run down the field for like 60 or whatever it was," Ikard said. "That's a relieving feeling. Usually you've done your job when that happens."