Jets rookie running back Joe McKnight admitted this weekend that he isn't in the best of shape. He cited the heat, a possible stomach virus and nerves as reasons for a difficult day of practice at New York's rookie minicamp. The fourth-round pick needed wet towels and breaks in the morning, and dropped at least four passes in one drill. "I'm not in good shape right now," said McKnight. "I'm in OK shape, but not the best. I could be better."