Harley: The manager Purchase Alesse Joe McKnight admitted in an AP report that he had migraines last Monday morning, when he struggled to walk on to the practice field in Cortland. Not only that, but he was recovering from a concussion -- an injury the Jets would only describe as a “head injury.” McKnight suffering from migraines the day after he returned to practice requires the question: What was he doing practicing at all? A few minutes later, he had to leave practice after going to the ground.