Keller's next step is Boston University, where he will join three other first-round picks from the 2016 draft -- defensemen Charles McAvoy (No. 14, Boston Bruins) and Dante Fabbro (No. 17, Nashville Predators), and forward Kieffer Bellows (No. 19, New York Islanders).
The BU class matched the University of Minnesota's in 2006 (Phil Kessel, Erik Johnson, Kyle Okposo and David Fischer) as the only two with four players taken in the first round of the same draft.
Keller is looking forward to his time at BU but said, "I'm not planning on staying for four years. I have other plans."
So do the Coyotes. Arizona director of player development Steve Sullivan, who played more than 1,000 NHL games and scored 290 goals as a 5-foot-8 center, understands that for a player like Keller to get this far -- and further -- confidence bordering on brashness is key.
"[At his size], he's been told a lot of negative things over and over … you won't play and can't play," Sullivan said. "For him to have the success that he has, you have to think it yourself before you can make anybody else believe it. I don't think he would have gotten this far without the belief he has in himself.
"When you have to work for it, you develop that work ethic and you give yourself a better chance. Not a lot of lazy players make it to the NHL. If we give him all the coaching and the tools and everything he needs to get better and if he brings the work ethic, he has every chance to be a special player."