He's working hard this season though to make his own mark on Golden Eagle football. After trying to learn the offense as a true freshman last year under Coach Fedora, he is now making the adjustment to a similar scheme with some different twists to it.
"I think the toughest adjustment was getting to know the new coaches and making those relationships," he said in a Friday interview after practice.
"As a redshirt freshman I have come into camp and tried to learn the new offense and it has been good because the staff is brand new too. Last year I just jumped into it, but I have come along good and am building those relationships."
Always known to be a smart and football savy player, Harrington is really starting to pick it up as practice progresses.
"I feel more and more confident each day," he said. "I was really feeling slow at the beginning of practices but I really feel like I am coming on pretty strong now."
Who has really had an impact on the young receiver during his time at Southern Miss?
"I would say Austin Davis was really instrumental to my development when I was a freshman and he helped me see that I can do as much as I can to help the team," he said. "This year it has been Quintin Pierce, he has showed me a lot and really taken his time with me.
"Also Tracey Lampley has helped me this year quite a bit because he really knows the offense."
His role is yet to be determined but he certainly hopes to be fighting for a starting position in the fall.
"Honestly I am here for whatever the coaches need me to do," he added. "I'd like to see myself in the rotation as a receiver and learn and develop into a regular guy. I'd like to earn some playing time at receiver but also be a big special teams candidate."
Down the road, he's hoping he can have the kind of impact on young receivers that others have been to him at the start of his career.
"I'd like to be that receiver that all the younger guys look up to and I want to communicate well with them," he said. "That is one of my main goals. Also, my routes need to be a lot quicker and I have to fight fatigue and just stay crisp on my route running."
Another adjustment for all of the receivers is not having Austin Davis to throw the ball to them. The door is now open for a new signal caller, and according to Harrington, it is still wide open.
"Chris and Ricky are head to head with each other," he said. "Every other play they are both making plays so it is just head to head. I wouldn't say there is a leading guy right now.
"Even Cole Weeks, he is doing great and has turned some heads. These guys are all doing well and we trust whoever earns the starting nod because they can all play."
The Eagles will continue spring practice tomorrow with a scrimmage Saturday morning.