The 23-year-old defenseman never had gone through a professional offseason training and nutrition program before this summer, though he went to development camp with the Los Angeles Kings in 2017 and played two seasons at the University of Maine. Previously he would go home, run sprints and feast on the good cooking of his grandmother and mother.
The Panthers sent Keeper to Cape Cod, Massachusetts, to work with Paul Vincent, their skating and skills coach, and Mike Donoghue, their strength and conditioning coach. For eight weeks, as often as five days a week, he worked on the ice and in the gym.
"Leaving home is still hard because I have babies and all that," said Keeper, who has two kids. "But it's a sacrifice I've got to make to play in the NHL or play pro hockey."
Another sacrifice: unhealthy food. His body needs the kind of fuel that will sustain him through an 82-game regular season and more.
"That was a big adjustment for me, and I'm still trying to do it right now," Keeper said. "I think once I get the hang of that, it's going to help me a lot."
Keeper said he spent about a month at home relaxing with family but had Donoghue send him things to do on his own.
"He's got work to do," Panthers general manager Dale Tallon said. "When we kept him [in the program] nice and tight, he was fine. And then he drifted away a little bit. And now we've got to bring him back in. We're very confident that he's going to do it. He just needs a little bit of … he's never trained. Ever. He did train. It worked. Now he's going to see what he really needs to do, and once he gets that down he's got a great chance to play."
Like a lot of young players, Keeper must learn how to be a pro.