The two points weren't really that important. Kris Letang's health is. The Penguins' star defenseman left Wednesday's 4-3 win — Pascal Dupuis won it in a shootout — in Dallas with a head injury. Already having sustained a concussion earlier this season, Letang was drilled in the head by Dallas left wing Eric Nystrom at the 9:55 mark of the first period. Letang remained on the ice for around a minute, clearly in discomfort while being attended to by trainer Chris Stewart. He finally left the ice — looking shaky as he skated toward the runway — and didn't return. "Kris Letang is day-to-day at this point," Penguins coach Dan Bylsma said