I know Dylan very well, and covered him in his time at Northern. He came to Northern to play QB, and they were pretty high on him as a RS. His RS-frosh season he was a in a three-way battle for the starting job and wound up third, though IMHO he was easily the second-best of the three guys. Dylan got some garbage time throughout that season and played pretty well. Then, in the spring of that year, new head coach Andrew Rolin opened up the starting job with the same three guys, but said he was going to name a starter before they all left for the summer. The depth chart came out the same as the year before.
Rolin saw an un-tapped beast in Cook at other positions, and btw, he was already Northern's long-snapper at that point and damn good at it. So, in the offseason, Rolin told Cook he'd easily be an NAIA All-American TE, and even suggested he could be a great two-way player having him play DE too. Dylan reported to fall camp for his sophomore year, but, one day in, changed his mind, and left the Lights. He didn't do it in a negative way, or trash Rolin or anybody else on the way out, he just decided that, he came to play QB at Northern and it didn't work out.
I didn't get a chance to talk to Dylan before he left Havre, but was told that he had enrolled at UM and had asked if he could walk-on. I believe originally, he thought TE, but, the Griz said yes, only as an OL. I ran into him at several Griz games last season, and talked to him about why he left Northern. He said, if he couldn't play QB at the Frontier Conference level, then why not see what he could do at a different position at a much higher level of football. He told me it was a dream of his to play bigtime college football all along. He also told me, at that time, he was worried about the OL transition because, at that time, he was actually losing weight.
Fast forward to this spring, talking to Bobby at the Spring GSA Tour in Havre, I asked him about Cook, and he said even then, that what he's doing is incredible, and that he was, at least, going to be in the mix come fall. And from that point on, it appears that Dylan has just kept getting better and better.
As an aside, I don't think there's any hard feelings on either side. Dylan is still really good friends with a bunch of guys here at Northern, and I know he's keeping an eye on what the Lights are doing. I also asked Rolin about it right after the video of Dylan getting awarded a scholarship came out, and he said he was super-proud of him and happy for him, and Rolin, who played QB at San Diego, and who also has been an assistant coach at San Diego and San Jose State, said that what Dylan is doing is literally unheard of. Certain transitions from one position to another, yes, but from third-string NAIA quarterback to starting right tackle for a Division I program, it's unheard of.