Ryan Bogan, who left the school this season, coached all of them. But few rivaled Clifton when it came to drive and fearlessness.
"He played like a monster in high school," said Bogan, who admits he's wondered which level would become too big a challenge for Clifton's slight frame. He's still waiting.
Asked to sum up what makes Clifton special as a player, Bogan recalled a rare regular-season loss. The team was playing uninspired against Brick High School and allowed the game's first three goals. Clifton scored two highlight-reel goals and hit the post, but the comeback fell short in a 3-2 loss.
"He was all over the ice and always had the puck in that game," Bogan said. "It wasn't because he was being selfish, it was that he basically decided that if the other guys weren't going to play hard, he was going to go out there and do it. He refuses to lose, and he won't quit. That's just who he is."
Those traits have served Clifton well during his journey to the NHL, which included stops with the New Jersey Hitmen (United States Premier Hockey League), USA Hockey's National Team Development Program, Quinnipiac University and Providence.
At each level, he's had to make a name for himself, forced to show again that his blend of skill and passion can be an asset.
"It's been a journey, and I think I have been working for it my whole life," Clifton said. "You dream about playing in the NHL and you don't know if it is a possibility until a certain level. When you get to that level, everything changes.
"This whole journey, I really embraced it. Each new coach, each new set of guys, you just want to learn from them. Everyone brings a different thing to the table. Each set of valleys you hit along the journey, you have someone that is going to help you through it, and that is what is great about the hockey world."