Kris Letang scored off a two-on-one 31 seconds into overtime and Sidney Crosby scored his 500th career goal as the host Pittsburgh Penguins won their fourth in a row, beating the Philadelphia Flyers 5–4 on Tuesday. Dominik Simon, Jake Guentzel and Chad Ruhwedel also scored for the Penguins. Letang and Crosby each added an assist, and Pittsburgh goaltender Casey DeSmith made 23 saves. The Penguins rallied from a two-goal, third-period deficit by scoring twice in 18 seconds. Scott Laughton had a goal and an assist and Claude Giroux, Nick Seeler and Justin Braun also scored for Flyers, who lost their third straight (0–2–1). James van Riemsdyk logged two assists, and Philadelphia goalie Carter Hart stopped 29 shots. Crosby is the second active player (Washington’s Alex Ovechkin), the 46th all-time player and the second Penguins player (Mario Lemieux) to reach 500 goals. Capitals 4, Predators 1 Alex Ovechkin reached 30 goals …