"He was a guy that we really weren't worried about having to take a big step forward, but he took it upon himself and he came back at an unbelievably new level," Carvel said. "He's faster, stronger, he's scoring goals in different ways that he wasn't scoring before.
Last season, UMass was led by Hobey Baker Award winner Cale Makar, now a rookie defenseman with the Colorado Avalanche. Leonard's skating, like Makar's, stands out.
"John's a unique player in that he doesn't need a lot of help to create offense," Carvel said. "He can create a ton by himself. He can skate the length of the ice, very similar to Cale, how Cale could use his strong skating to create offense."
"The game-winning goal against Northeastern, he stickhandled through four different guys and then put the puck in a real tough place for the goaltender."
Leonard is setting himself up to follow in the footsteps of Makar, who signed an NHL contract after last season.
"Where Cale wasn't ready to leave after one year, John wasn't quite ready to leave after two, but he's showing he'll be ready after this year," Carvel said. "He's always been a good player, but now he's becoming a special player and it's great to see."