LOS ANGELES - Portland Trailblazers guard Brandon Roy and center Greg Oden head this years NBA Knee-League All Star game, which will feature the players swimming laps, doing limited excercise, and granting interviews.  "We are really excited to be a part of the Knee-League festivities," stated Roy, his first season on the roster after being snubbed last year due to a misunderstanding on how much of his meniscus actually remained.  Three-time Knee-League All Star Greg Oden is expected to sit out the game this year due to injury.  The roster also includes Caron Butler of the Dallas Mavericks, Linas Kleiza of the Toronto Raptors, and Michael Redd of the Milwaukee Bucks.  Notable snubs include the Blazers' Marcus Camby, whom voters apparently thought waited too late in the season to injure his knee, and Elliot Williams, who instead was awarded a spot on the Knee-League Rookie team.  Camby is a likely replacement for Oden.