With less than a week until they open the season the Penguins have lost defenseman Kris Letang for an undetermined length of time. Letang got what is believed to be a knee or lower-leg injury Friday in practice. The Penguins don't expect to learn the severity of it until after they return home Monday from a weekend of practice and team-bonding activities at the U.S. Military Academy. "I don't really have any indication of whether that's a short-term or extended [injury] or what the extent to that would be" coach Dan Bylsma said Saturday. "We're going to wait to see when we get back to Pittsburgh." Letang 26 did not practice Saturday and won't again today. He was a finalist last season for the Norris Trophy which goes to the top defenseman in the NHL after averaging more than a point a game. He is the quarterback of the team's top power-play unit and is slated to skate on a top pairing with Rob Scuderi. The Penguins open the 2013-14 season Thursday against New Jersey at Consol Energy Center. Read more: http://www.post-gazette.com/stories/sports/penguins/penguins-notebook-prognosis-uncertain-for-letang-injury-705331/#ixzz2gFo3FxSM