Following the Bruins' 4-2 victory in Game 3, head coach Jim Montgomery offered some insight into Krejci's situation and his potential availability for Game 4, according to Fluto Shinzawa from The Athletic:
It's quite possible that Krejci is still dealing with the lingering injury that sidelined him for multiple games toward the end of the regular season. Similar to captain Patrice Bergeron, Krejci's greatest contribution will come when he's in top form. So, his health remains a priority.