The optimism following the first preseason victory was shattered early in Sunday's practice when running back Thomas Jones suffered what appeared to be a lower leg injury, quite possibly to his right calf or Achilles tendon. Though the injury was not severe enough to keep him from walking off the field under his own power or participating in cardio and strength exercises with other injured players for the remainder of the practice, it is undoubtedly a subject of concern for the Jets, who acquired Jones from the Bears in an off-season trade. Jones was expected to become a mainstay in the Jets' backfield. In Friday's preseason game, he ran the ball eight times in the first 12 offensive snaps.