A pane of glass fell on Krejci during the postgame celebration after Game 1 on Thursday night, which the Bruins won 1-0 in overtime.
The fifth-year center had 62 points on 23 goals and 39 assists during the regular season.
A pane of glass weighs about 30 pounds, according to a member of the Bruins' "bull gang," which maintains the ice at TD Garden.
"It was a fluke accident and we're fortunate it wasn't worse than what it is," coach Claude Julien said at Friday's practice. "With the weight of that glass it could've been worse and a lot more damaging."