Sanguinetti, a former first-round draft pick of the New York Rangers, fired a snap shot from the top of the right circle over the glove hand of goalie Kevin Poulin at 10:17. The 24-year-old defenceman, who has battled injuries throughout his career, had one assist in 20 NHL games before Sunday. He spent most of last season with AHL Charlotte.
John Tavares and Matt Moulson had given the Islanders a 2-0 lead midway through the first period, and New York seemed on its way to a third straight victory.
But Eric and Jordan Staal scored 45 seconds apart late in the second period to tie it at 2.