Sixers guard Jason Richardson missed his sixth consecutive game Friday with left knee synovitis. Richardson was examined and had his MRIs reviewed by Dr. Richard Steadman in Vail, Colo., Thursday. He was seeking a second opinion on the extent of his injury after fluid continued to build up in his knee after working out earlier this week. He had 20 milliliters of fluid drained from the joint on Jan. 17. Richardson was unable to return to Philadelphia because of weather-related issues, according to a Sixers spokesperson. Sixers coach Doug Collins sidestepped a question about Richardson and the team provided no additional information about the veteran guard's condition. The 32-year-old Richardson has started all but 11 games over his 12-year NBA career. He has two years and $12.5 million remaining on a contract after this season.