According to a report by The Wrestling Observer, Rey Mysterio appeared to have injured his knee during a match with Alberto Del Rio at last night’s Raw house show event in Salt Lake City, Utah. Mysterio was spotted limping to the back after the match. The crew has an event today in Fresno, Sunday in Stockton and in San Jose for Monday Night Raw. We should know more about the seriousness of Mysterio’s injury over the weekend.