The 6-foot-3, 220-pound defensive end from Hendrickson High School in Pflugerville, Texas, said his gut told him the Buffs were the right choice.
"They were my best offer right now and I really like the place," Irokansi said. "I did a lot of research on it and it's just somewhere that I can really see myself playing.
"I decided to commit. I was just at the point where I was like, 'Well, what am I waiting for?'"
Irokansi, a three-star prospect ranked the No. 62 defensive end in the nation by Scout.com, has not visited CU but he plans to during the season, if possible, or once his senior season is complete.
Irokansi chose Colorado over reported offers from Army, Iowa State, New Mexico, Southeast Louisiana, Texas State and Texas-San Antonio. He is the eighth known commitment in the 2012 recruiting cycle for the Colorado program and the fourth player from Texas.
Wide receiver Gerald Thomas of The Colony, Texas also recently committed to CU. Irokansi said he talked with Thomas on Facebook after Thomas had announced his decision and the conversation helped him feel more comfortable about also choosing Boulder.
"I'm going to talk to some of the other guys," Irokansi said. "Talk about bringing Colorado back. Make that a goal of ours, go ahead and bring Colorado back to how they used to be, winning championships."
Irokansi said his relationship with coach McGhee was a factor in his decision, but it wasn't the primary reason he decided to be a Buff.
"I called him up today and told him I wanted to commit and he was ecstatic about it," Irokansi said. "I just feel great about it.
"He's a down-to-earth guy. He's from Texas. He's from Houston. He played at Colorado and now he's back coaching at Colorado. I mean, he's a Texas boy and now he's living in Colorado. Something about it has to be good. He's from Houston. Why didn't he come back to Houston? He's at Colorado right now and he loves it and I can relate to him because we're both from Texas."
Irokansi says his commitment is solid and he likes having the decision behind him. He said he is turning his attention to the weight room for the rest of the summer and playing well during his senior season.
He produced approximately 50 tackles and seven sacks as a junior and hopes to improve on those numbers this fall.
"It was just the right time," he said. "I got to thinking about it and I was like, 'What else am I looking for really?' You play in the Pac-12, have all the tradition in the world, they great facilities, it's a great place. It got to the point where I was like, 'What else am I waiting for?'"