The Penguins announced today that defenseman Kris Letang will not play Tuesday against the Islanders and is day-to-day with a lower-body injury, according to an NHL.com report. Letang, who has missed time twice this season due to concussion-like symptoms, collided with New Jersey's Dainius Zubrus during Sunday's game. He returned, however, and played more than 22 minutes.