Pros: "Displays solid flexibility working from a three-point stance. Flashes the ability to fire out and deliver a good initial pop on contact. ... Does display some tenaciousness and above average playing strength and when he can get into defenders he can create some push. Flashes the ability to step and gain position and reach defenders well. ... Maintains a good base and flashes the ability to get hands on and lock down rushers. " -- ESPN scouting report
Cons: "Regardless of where he lines up he will need to work to add a significant amount of bulk to his frame. ... Needs to do a better job of keeping his pads down and rolling his hips when he engages a defender as you don't see that from him and he can get overextended. ... He needs to keep developing his game and adding size. We don't see an immediate contributor, but with some work, down the line he could grow into a productive college O-Lineman." -- ESPN scouting report
Similar to/potential role: He's in a similar position as rising redshirt freshman Wendy Laurent, who also came in a little light but spent a redshirt season bulking up. Hartman is nearly a lock to redshirt because of his size, and he'll likely be relegated to the scout team his first year.
Expected impact: 2016. Hartman will have to spend his career battling against Brendan Mahon, a more highly touted and more polished offensive guard. As a result, he might have to wait his turn to see considerable playing time and will likely play a backup role for the foreseeable future. As he adds bulk and strength, that could change. But, as of now, it looks as if it'll be a few years before Hartman makes an impact.