PITTSBURGH (AP) — Erik Karlsson scored twice, Evgeni Malkin also scored and Tristan Jarry recorded a shutout in his return from injury, as the Pittsburgh Penguins beat the Buffalo Sabres 4-0 on Saturday night. Both of Karlsson’s goals came in the third period — on the power play early and a late empty netter — to extend a five-game point streak. Malkin scored his eighth goal of the season and added an assist. Drew O’Connor scored his first and Sidney Crosby extended an eight-game point streak for the Penguins, who have won four straight. Ukko-Pekka Luukkonen stopped 36 shots for Buffalo, which lost for the third time in five games.