SAN JOSE San Jose Sharks defenseman John Klingberg has been playing some of his best hockey of the season in recent weeks but now has a lower body injury and is considered doubtful to play against the Tampa Bay Lightning. Sharks coach Ryan Warsofsky said Friday that Klingberg's injury cropped up during the Sharks' 4-3 shootout win against the Minnesota Wild, as the veteran defenseman had a team-high 25:46 in ice time.