Nic Dowd redirected Noah Hanifin’s shot from the point to put Vegas ahead at 7:20 of the third period and the Golden Knights beat the Utah Mammoth 4-2 on Sunday night in Game 1 of their first-round series.

Mathew Barzal broke a tie late in the third period and the New York Islanders beat the Boston Bruins 4-1 on Saturday night to even the second-round playoff series at two games apiece.

Casey Cizikas scored on a breakaway with 14:48 gone in overtime and Semyon Varlamov returned to the net to make 39 saves to lead the New York Islanders to a 4-3 victory over the Boston Bruins and knotting their second-round playoff series at one game apiece.

Trade deadline acquisitions are already paying big dividends for teams that have advanced to the second round of the NHL playoffs.

Brad Marchand scored 39 seconds into overtime and the Boston Bruins rallied to beat the Washington Capitals 4-3 and even the East Division first-round series at a game apiece.

Brad Marchand had two of his three goals and set up another in Boston’s five-goal second period.