On Wednesday, however, they pulled the trigger on an offer to the 6-foot-7, 240-pound forward.
He hails from St. Louis, playing his ball alongside the No. 1 prospect in the class of 2016, Jayson Tatum.
Cook is one heck of a prospect in his own right, though. So much so that he is now billed as the No. 73 player in the 2016 Scout.com rankings.
Much of his improvement has been due to his recent body transformation. Cook has been practicing religiously and getting himself into the gym, and it certainly shows.
"I'm playing harder and with a lot of confidence," he said. "I'm doing a lot of the same stuff. But just showing more aggressiveness, more of a complete player."
With newfound stamina, it has allowed Cook to produce well in front of college coaches during the Nike EYBL circuit this season. He has garnered offers from Kansas, Iowa State, Kansas State, Virginia Tech, Memphis, among others.
The opportunity to stay at home though and play for the Billikens is an intriguing one for the St. Louis native.
"“It was really cool, just being able to say I have an offer from [SLU], he said. "I’ve known them for a pretty long time, I got to meet all of them for the first time about a year ago when I came to visit SLU. [Jayson and I] talked about it, but not too in-depth."
Cook was a frequent spectator at the Chaifetz Arena last year for Bills' games, too.
What's going to swing Cook's decision, though? Well, a number of things could ultimately factor in. Not only is the relationship with a coaching staff important, but a place that will develop him over four years.
For now, the big man feels as though more work is needed.
"I don't take rankings too seriously," he said. "It was verification, but I know there's a lot left to be done."
He currently only has one visit lined up, as he's heading north to Michigan on August 9.