The Toronto Maple Leafs are without star winger William Nylander for Game 1 against the Boston Bruins on Saturday night.
The 27-year-old experienced some discomfort when he woke up Thursday, one day after the Leafs' final regular-season game, reports TSN's Chris Johnston.
Nylander didn't attend Friday's practice or Saturday's optional morning skate.
He skated in all 82 games for Toronto this campaign, registering 40 goals and a career-high 98 points. He represented the Maple Leafs at the 2024 All-Star Game in February for the first time in his career.