PITTSBURGH (AP) – Brock Nelson’s second goal of the game 2:55 into overtime capped a frantic comeback to lift the New York Islanders over the Pittsburgh Penguins 5-4 Tuesday night to extend their points streak to 15 games. The Islanders trailed by two late in the third period before goals by Josh Bailey and Ryan Pulock in the final 4:29 of regulation forced overtime. Nelson won it when he fired a shot at Matt Murray that trickled to the goaltender’s right. Nelson tapped the rebound into the open net for his sixth goal of the season. Anthony Beauvillier added his seventh for the Islanders, and Semyon Varlamov stopped 27 shots as New York improved to 14-0-1 in its last 15 games. Brandon Tanev scored twice for Pittsburgh. Jake Guentzel had a goal and an assist and Bryan Rust also scored for the Penguins. Murray finished with 37 saves. Pittsburgh handed the Islanders their only setback during this torrid stretch when it rallied form three goals down in the third period to win in overtime. New York returned the favor in the opening leg of a home-and-home that continues Thursday Guentzel made it 4-2 early in the third period when Alex Galchenyuk stopped high in the offensive zone and found Guentzel streaking down the middle. Guentzel flipped the puck by Varlamov’s right pad and New York’s first regulation loss since the second week of the season seemed imminent. It wasn’t. Three days removed from a massive third-period comeback against Philadelphia – when the Islanders erased a three-goal deficit to win in overtime – Bailey’s goal with 4:29 to go got New York back within one. Pulock then tied it when he drilled a slap shot from just inside the blue line with 1:32 remaining after New York pulled Varlamov for an extra skater. Rust’s seventh goal in 10 games gave the Penguins the lead 11:34 into the first, a wrist shot from the slot set up by a backhand pass from Guentzel, who flicked a backhand pass from the right post to Rust’s stick. Tanev pushed Pittsburgh’s lead to 2-0 less than five minutes later, redirecting John Marino’s shot from the point by Varlamov. New York, as it has done regularly during the opening two months, responded emphatically. The Islanders pulled even in the second on goals 2:51 apart. Beauvillier found a soft spot in the left slot between four Pittsburgh defenders and flicked a wrist shot by Murray to make it 2-1. Nelson deflected a Leddy point shot by Murray less than three minutes later to tie it.