"When I first got to Contra Costa, Coach Carter asked me what schools I wanted to hear from and USC was the first school I said. I've always liked them and I had a great trip, I learned a lot about the program. The alumni support is one of the things that really stood out.
"The coaches talked a lot about the Trojan family and just how many opportunities open up for you outside of football when you have a USC degree. It felt like a big family there and the players and coaches really made me feel comfortable there."
The opportunity to come in and make an immediate impact was another big plus for Harrison.
"They told me that left tackle spot is mine if I come in and take it," Harrison said. " That's another thing they talked a lot about, the tradition of great offensive lineman USC has produced, especially at the tackle position. The USC football program is pretty historic and I've always liked their style of play. I think I would fit in really well and I'm definitely giving USC a very hard look right now."
Harrison won't sign until February and won't enroll until next fall so he's in no hurry to make a decision.
"I'm very happy about that because there's no way I could decide right now," Harrison said. "My final four are Arizona State, , Texas, Oklahoma and USC and that's in no order. I had four great trips to all those schools and I don't have a leader right now among them.
"My plan is to wait until the middle of January before I make my decision. That way, I can have all the coaches in for home visits. That's going to be big for me. I want my family to meet the coaches so they can see who they like and give me their opinion. I'm a little stressed right now to be honest, this is a big decision and it's going to be really hard but I know I can't go wrong with any of the four schools."