CORTLAND, N.Y. -- New York Jets running back Joe McKnight appeared to be OK after he was carted to the locker room, wearing an oxygen mask, after dropping to the field during a drill Monday. McKnight, who has a history of migraine headaches, has been recovering from a head injury and dealing with dehydration during training camp. About an hour after being escorted to the locker room, he walked to the field to watch the end of practice in a T-shirt and shorts while wearing dark sunglasses. McKnight was not available to the media, walking past reporters without comment, and the Jets had no further details on his condition. Heading to the field at the start of practice, he dropped to a knee three times and was examined by trainers. After pouring water over his head, McKnight then jogged and appeared OK. "If the trainers thought he would be at risk, he would never be out there, ever," Jets coach Rex Ryan said. Wearing a red no-contact jersey, he was participating in a drill 45 minutes into practice when he went down again after diving for a pass. Trainers rushed to him, then walked him to a medical tent behind the field. McKnight remained on his right side as he was examined for several minutes. It appeared trainers were also checking his lower left leg before he was removed on a cart. He was wearing an oxygen mask as he walked gingerly on his own into the locker room while a trainer held the tank. "For whatever reason, he stopped or whatever and thats fine," Ryan said. "Theres no chance any player would be on the field if the trainers or doctors felt that it wasnt safe for that person to be there." McKnight has had a rough summer. He failed a conditioning test just before the team reported to Cortland, but passed the next day. He blamed the failure on dehydration and his low percentage of body fat (3.3 per cent). Ryan also suggested that McKnight has "anxiety" when it comes to the conditioning tests. McKnight was arrested two weeks ago in New Jersey, an off day for the team, for outstanding traffic warrants. He was released on $320 bail, the amount of the tickets. Later that week, he injured his head during practice -- an injury the Jets still havent officially called a concussion -- and he returned to the field Sunday, wearing the no-contact jersey. After practice, McKnight spoke to reporters for 3 minutes, but refused to answer any questions about his head injury or the arrest, repeatedly saying, "Im not getting into that right now." While he was in the locker room while being treated Monday, the Jets confirmed that McKnight angrily responded on Twitter to someone he thought was a reporter who wrote, "about time you get released. Good luck. And stay healthy." McKnight tweeted that he was "trying to keep my cool" before adding that "now it has gone too far with these reporters." He then asked, "are you outside," but a public relations staff member assured McKnight the critical tweet had not come from a reporter but a fan. McKnight, the teams fourth-round pick out of Southern California in 2010, has had his moments on the field with the Jets, but his inconsistency has kept him from being a bigger part of the offence. He has proven himself to be an outstanding kick returner, with two touchdowns, including a 107-yard score in 2011 that is the longest play in franchise history. But his health issues possibly put him on the bubble for making the 53-man roster. "Weve got a long way to go before we make the final decisions and things," Ryan said. "But Joe has led the league in kick returns. He has plenty of talent, but durability, there is concern about durability." Discount Air Max 1 Black Friday 2019 . -- New England Revolution goalkeeper Matt Reis is retiring after a 16-year career to become the goalie coach for the Los Angeles Galaxy. Cheap Air Max Free Shipping . - The Oakland Raiders re-signed offensive lineman Khalif Barnes on Friday. http://www.airmaxcheapdiscount.com/ . -- Patrick Reed got an early start in golf. Air Max Black Friday . -- New England Revolution goalkeeper Matt Reis is retiring after a 16-year career to become the goalie coach for the Los Angeles Galaxy. Nike Air Max Cyber Monday . Deulofeu injured a muscle in his right leg in Evertons 4-1 win over Fulham in the English Premier League on Saturday. Barcelona says that its team doctors will "co-ordinate" with Evertons medical staff as Deulofeu recovers. COLORADO SPRINGS, Colo. -- Hayden Graham scored 16 points and Air Force beat NAIA-member McPherson College 88-71 on Friday night.Air Force went on a 19-2 run in the first half to take control and led 45-31 at the break.Frank Toohey and Zach Kocur added 14 points apiece for Air Force (1-0). Graham was 7 of 11 from the field and grabbed five rebounds. 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