Jason Spezza scores 2 power-play goals as Dallas Stars beat Detroit Red Wings 4-2
Tyler Bertuzzi scores 1st NHL goal.
Charts 2 goals, 2 assists as Pittsburgh wins for 4th time in 5 games.
Early lead vanishes for Columbus.
Okposo has goal, assist for Sabres, who snap 5-game losing streak.
Girardi finishes with a goal and an assist for Lightning in 5-2 win.
Bobrovsky charts 42 saves.
Mantha, Nyquist find back of net in third period of 4-2 victory.
Columbus back home Sunday against Florida.
Jimmy Howard made 37 saves for Detroit.