Keller, 18, grew up in Swansea, Ill., a suburb less than 20 miles from St. Louis. His parents, his brother and dozens of other family members and friends attended Monday's game and heard his name announced in Arizona's starting lineup.
"It was a really special moment getting the start," Keller said. "It was something that I'll remember forever. You only have one first NHL game so it was pretty cool. It was really special to have the first one here ... The first game, I just tried to battle every time that I could and never stop moving. I think the more games that I play the more comfortable I'll get ... It's a lot different than college. It's way faster, but I'll get used to it."
Keller's experience began when teammates, per tradition, made the rookie skate a few warmup laps by himself.