games out of the second wild card and 4-6 in its past 10 games. Hinch acknowledged that the team is walking a tightrope with the two pitchers.Th

RIO DE JANEIRO -- Fresh off his Olympic silver medal, Juan Martin del Potro will return to the US Open for the first time in three years after receiving a wild-card invitation from the U.S. Tennis Association on Tuesday.Del Potro missed more than two years worth of major tournaments because of three operations on his left wrist, returning to Grand Slam action at Wimbledon in June.His ranking was too low to gain direct entry into the field at Flushing Meadows for the years last Grand Slam tournament, which starts in New York on Aug. 29. He is 141st this week.On Sunday, del Potro lost to Andy Murray in the mens final at the Rio de Janeiro Games, getting a silver to add to the bronze he won for Argentina at the 2012 London Olympics. It was quite a run for del Potro in Brazil: With his terrific forehand in top form, he stunned 12-time major champion Novak Djokovic in the first round and 14-time major champion Rafael Nadal in the semifinals.If he stays fit, Murray said about del Potro, theres no reason why he cant be up at the top of the game.Seven years ago at age 20, del Potro beat five-time US Open champion Roger Federer in five sets in the US Open final and was considered the next big thing in tennis. But soon afterward, del Potro developed problems with his right wrist. Then came problems with his left, which he uses for a two-handed backhand.Hes done amazing, really, to get back to playing and competing again at this level after all of the issues he had with his wrists, Murray said Sunday night. Mentally, I can only imagine how frustrating that must have been, to kind of keep going through the same problem and having to try and come back.Among the players on the list of wild-card recipients announced Tuesday by the USTA were two Americans who earned mixed doubles medals in Rio: gold medalist Bethanie Mattek-Sands and silver medalist Rajeev Ram.Other men receiving wild cards: Bjorn Fratangelo, Frances Tiafoe, Mackenzie McDonald, Michael Mmoh and Ernesto Escobedo.Women given entry into the field: Danielle Collins, Kayla Day, Lauren Davis, Sofia Kenin, Vania King and Frances Virginie Razzano.The USTA also handed out wild cards for qualifying, including to surprise 2009 U.S. Open quarterfinalist Melanie Oudin of Marietta, Georgia, and Laura Robson of Britain.Play in the US Opens main draw begins on Aug. 29.Patty Mills Jersey . 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United chose the defender in the second round of the 2013 MLS re-entry draft.As the Houston Astros battle to stay in the playoff chase, its not clear whether two starters who helped them to the postseason last year will do the same this year.Left-hander Dallas Keuchel, who has been sidelined with shoulder inflammation, said Monday that he is not ready to resume throwing. Hes been out since Aug. 27 and said Friday that he would reassess his situation Sunday. That re-evaluation has been pushed back to Wednesday.Right-hander Lance McCullers, meanwhile, hasnt thrown off a mound as he tries to come back from a sprained elbow suffered Aug. 2.Its going to depend on where were at as a team and where theyre at, Astros manager A.J. Hinch said Monday, according to the Houston Chronicle. Our idea is to continue positive progress with these guys and not set a timeline or a necessary deadline for them to have to meet. Otherwise well threaten further injury. One more setback for any of these guys, and its over.Keuchel, 28, won 20 games and the Cy Young llast season for an Astros team that advanced to the division series, losing to the eventual World Series champion Royals.dddddddddddd. McCullers, 22, was counted on to be a big part of the Astros this season after an encouraging rookie campaign.Astros starters are struggling at the wrong time. Houston is 3? games out of the second wild card and 4-6 in its past 10 games. Hinch acknowledged that the team is walking a tightrope with the two pitchers.Theyre not doing enough to be ruled in or out, Hinch said, according to the newspaper. McCullers is the closest guy, but you can play catch all you want -- until you get on the mound, its when you really get serious about pitching. Keuchels not throwing yet, so theres certainly some concern on both of theirs for different reasons because of where we are on the schedule, but well go day-to-day. ' ' '