RICHMOND, Va. -- Washington Redskins cornerback DeAngelo Hall said Tuesday he has sprained ligaments in the back of his right ankle and could miss the rest of training camp. "I cant put any pressure on it. Its kind of funky. Ive never had this particular injury before," Hall said. "It could take a couple of days, it could take a couple of weeks, so theyre cool with me just sitting down for now and give it time to rest and heal up." Hall wore an immobilizing boot as he watched practice. He was hurt Monday when he lost his footing trying to defend rookie free agent receiver Skye Dawson, who has been one of the surprise standouts of camp. "The young guy, he ran a great route," Hall said. "Coming out of my break, something just gave out." Hall said he initially thought he tore a ligament. He said there is no fracture, and that his Achilles is fine. "A lot of guys were joking, Yeah, you wanted a day off. Im like, Yeah, I wanted a day off, but not like this," he said. Hall becomes the fourth Redskins defensive player to suffer a significant setback since the opening of camp. Defensive end Adam Carriker had a third surgery on his right knee and is expected to be sidelined another four to five months. Linebacker Keenan Robinson is out at least three months with a torn left pectoral muscle, and defensive end Jarvis Jenkins was hit with a four-game suspension after testing positive for a performance-enhancing drug. The Redskins worked out veteran linebacker Nick Barnett on Tuesday. They gave linebacker Joe Mays on workout on Saturday, but Mays agreed to terms with the Houston Texans. Also Tuesday, left tackle Trent Williams sprained his left wrist when he fell while blocking a play during the afternoon practice. The wrist was heavily taped as he walked off the field. "Its really nothing, though," he said. "Just stunned a little bit. Ill be fine." Several other players missed all or part of practice for various injury-related reasons. Receiver Donte Stallworth, guard Adam Gettis and linebacker Jeremy Kimbrough are nursing hamstring injuries. Safety Brandon Meriweather is still recovering from a torn ACL in his right knee, and running back Chris Thompson continues to feel the effects of a torn ACL in his left knee. Safety Jordan Pugh left early because he "wasnt feeling very good," according to Shanahan. Also, running back Tristan Davis, who has been on the practice squads for six NFL teams but has never appeared in a regular season game, has left the team. "Tristan Davis came to my office earlier this morning and said that his heart wasnt in playing football anymore," Shanahan said. "So he retired." Penguins Jerseys 2020 .R. Smith realized how easily basketball can be taken from him, and he wasnt going to take his place in the NBA for granted anymore. Wholesale Penguins Jerseys . John Tavares, Thomas Vanek and Kyle Okposo were also being counted on to slow down sizzling Rangers forward Rick Nash. 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The United States scored twice late to stun Mexico 2-1 and reach the semifinals of the Under-20 World Cup in Papua New Guinea on Friday.Mexico had taken the lead on Maria Sanchezs free kick in the 65th minute, but the U.S.s Ashley Sanchez provided two assists to give the U.S. the win.The U.S. tied it when Ashley Sanchez played through substitute Ally Watt to score inside the near post in the 81st minute.And deep into stoppage time, Ashley Sanchez beat a defender to the endline and crossed the ball into the box. Mallory Pugh dummied it and Kelcie Hedge, another sub, fired home for the winner.The match featued the U.S.s Sabrina Flores playing against her twin Monica of Mexico, and Sabrina consoled her sister after the game.The U.S. will face North Korea -- which beat Spain 3-2 in extra time -- in the semifinals on Tuesday, with the winner advancing to face Japan or France in the final on Dec.dddddddddddd 3.Mexico was everything we thought they would be and more, U.S. coach Michelle French said. I said after the last game that our best soccer was in front of us, but today it wasnt about the soccer, it was about the heart and determination and the USA mentality that weve seen over the years.The resolve this group of players played with, the belief that the players one through twenty-one had that we would come back and get a result was amazing.Looking in their eyes during the water break (at 75 minutes), they 100 percent felt they could come back in the game, and thats something thats been built into our culture. What a crazy, crazy game and a really fun way to make the semifinal. ' ' '