Pastrnak will be reevaluated in two weeks and is expected to play again this season.
Pastrnak attended a sponsorship dinner Sunday evening when he fell and injured his thumb, general manager Don Sweeney told reporters Tuesday.
The injury is obviously a huge blow for the Bruins, as Pastrnak leads the team in goals (31) and points (66), numbers that put him in the top 10 in the National Hockey League in both categories. He's topped 30 goals for three straight years, and he was on pace this year to top 40 goals for the first time. Kane, who had the secondary assist on the goal, has 32 points (11 goals, 21 assists) during his point streak and also extended his assist streak to 14 games, tying Stan Mikita for longest in Chicago history.
The Bruins now rank third in the Atlantic Division, one point behind Toronto for second place, and one point ahead of the Canadiens, who now sit as the top wild-card team in the Eastern Conference. He ranks seventh in the National Hockey League with 66 points in 56 games and second among all players with 29 power-play points.