That's a remarkably high ceiling for a kid who, not even three years ago, had never played the position before. It was during his sophomore year at Minnetonka High School in Minnesota - the year before he left to spend two years with the U.S. National Team Development Program - that Miller's coach, Brian Urick, floated the idea of moving Miller from forward back to the blue line.
It was not love at first shift.
"I didn't really like it at first, so I went back to forward for a little bit," Miller told NYRangers.com. "I went back to forward and bounced back a couple times. I just wasn't really getting it at first.
"But then I tried it again and I thought I did a really good job of just adjusting and really changing my game. So it was pretty cool to see my, I guess you'd say to see my development. I'm pretty happy I stuck with it."
Miller now says he likes to model his game after, among others, Columbus' Seth Jones - "a great American hockey player with offensive and defensive abilities." Granato has never seen Miller play forward, but if having Miller play the back end means a coach can have him out on the ice for more minutes each game, "Yeah, I see why you do it," the coach said. "The skill set and the way he thinks the game, that makes sense to me now that I see it."
"The change, and how he handled the change, is really incredible," said Granato, who broke into the NHL with the Rangers as a rookie left winger in 1988 and now is in his third season as bench boss at his alma mater. "He went from playing high school forward to playing U.S. Developmental Team defense, and playing against the best players in the world at his age level at a different position. I think that says a lot not only about his athleticism but about his commitment and love for the game. You've got to love the game to really be able to pull off what he did.
"I think it's a great story, and I think it says a lot about his character and who he is."
It was that character, to say nothing of Miller's reach and size (6-4, 210 pounds), supreme skating ability ("with ease and with grace," Granato said) and big shot that drew the Rangers to him. Back in June, General Manager Jeff Gorton shipped a pair of picks to the Ottawa Senators to move into the No. 22 spot and grab Miller.
"The fact a team wants you badly enough to trade up for you, it means so much," Miller said. "That was a very special moment to experience that with my mom, and my family members. I really have no words for it. It was unbelievable, to be drafted by the New York Rangers was unbelievable."