Boston Celtics stud Jaylen Brown has found a unique way to keep in shape while stuck in quarantine like the rest of us. Brown has employed the services of his 78-year-old grandfather to serve as his trainer for the past couple of months.

Brown's grandfather, Willie Brown, is no ordinary trainer. He was sort of a legend in the boxing circuit during his heyday, serving as a sparring partner for some of the biggest names in boxing, including the likes of Muhammad Ali and Joe Frazier.

The Celtics youngster opened up about bringing his granddad from Atlanta, who as it turns out, prepared quite a rigorous fitness program for the 23-year-old:

“We said we needed him to help me train and get back ready for the season, so he could feel comfortable sticking around here,” Jaylen said, via Adam Himmelsbach of The Boston Globe. “But on the other side of that, he’s like, ‘OK, we’re going to train then.’ We’ve been training hard and a lot. On one hand, it’s great that he’s comfortable being here, but on the other he’s making me work my [butt] off.”

The Celtics swingman also added that aside from being beneficial to himself (he thinks he's in the best shape of his life), he also feels that he's helping his grandfather by giving him a sense of purpose.

When asked about his trainee, Willie admits his grandson has left him quite impressed:

“It’s beautiful,” Willie said. “I can’t believe it myself. He works like a pro. It’s in his blood, you understand that? He does amazing things.”

There is surely some bias here, but there's also no denying that Jaylen Brown is one of the most promising youngsters in the league today, along with Celtics teammate Jayson Tatum. So in this respect, the high praise from Willie is definitely warranted.