Boychuk was injured in the second period of the Islanders’ series-clinching win over the Pittsburgh Penguins on Tuesday. He left the game and did not return.
The timeline would knock Boychuk out for at least the team’s second-round series. The Islanders, who are in the second round for just the second time in 26 years, will face the winner of the Washington Capitals–Carolina Hurricanes series, which is tied 2-2.
Boychuk tallied three goals and 16 assists during the regular season. He had one assist in the Islanders’ four-game sweep of the Penguins.