"Yes, I did commit," Chaisson said. "I'm very excited about my decision and I can't wait to start working."
Chaisson, who was in Norman two weekends ago, had initially said he was going to take his time on making his decision. The country's ninth-rated defensive end was also entertaining offers from the likes of Florida, Nebraska, Oregon, California and others.
But all that changed after Chaisson and his mom visited the campus.
"My mom got to meet some of the coaches and check out the academics and she really liked it," he said. "She said if that's where I wanted to be, then she was behind me 100 percent."
"I was planning on taking it slow and taking my time, but I just knew it was the right place for me," he said. "I just had a great feel for OU when I was there and I really got along with the coaches."
Chaisson made his decision on Monday night and immediately called coaches Bob Stoops and Kevin Wilson. He wanted to let them know – and the rest of the country as well.
"I wanted to make it known that I'm going to play for Oklahoma."
Chaisson (6-4, 250) had 102 tackles and 23 sacks as a junior. He bench presses 395 pounds and squats 525. He has a 36-inch vertical jump and runs a 4.72 in the 40-yard dash.
Chaisson is Oklahoma's ninth commitment of the 2009 class, including the third in the last two days.