Penguins defenseman Kris Letang, who has missed the first three games of the season because of an apparent knee injury, skated for about 50 minutes before the team practiced at Southpointe today.Coach Dan Bylsma said Letang will accompany the Penguins to Florida for the two-game trip that begins Friday night in Sunrise, but cautioned against assuming he will be back in the lineup while the Penguins are on the road. “Kris needs to progress back to practice before we’d think about putting him in a game at this point in time,” Bylsma said. “I don’t see him just stepping back into a game situation without a team practice.”