Illness and a dramatic crash have affected two members of the host country's team.
World champion snowboarder Max Schairer of Austria has been transported to the hospital to test for a concussion after a nasty wipeout in the Winter X Games snowboardcross semifinals.
Olympic flyweight Rau'shee Warren will have to wait for the trials now because his opponent in Friday night's title bout received a medical disqualification for fractured ribs.
Mark McMorris' fractured rib is steadily improving, so much so that the gold-medal favorite in Sochi plans to snowboard in a few days to "see how it goes."
Mark McMorris, the silver medalist from Saturday's Snowboard Slopestyle final, broke a rib in a slope crash.