DALLAS -- U.S. Open champion Dustin Johnson withdrew from the Rio Games on Friday because of concerns over the Zika virus, costing golf three of the worlds top four players for its return to the Olympics after a 112-year absence.Jordan Spieth is the only player from the top four who has not said whether he is going to Brazil. A decision could come as early as this weekend ahead of The Open Championship. Rickie Fowler also is undecided.Johnson, No. 2 in the world after his U.S. Open title and another World Golf Championship victory last week, is the 13th golfer to pull out of the Rio Games. Eight of them, including world No. 1 Jason Day and No. 4 Rory McIlroy, specifically have cited Zika as the reason.Patrick Reed, who said earlier this week at the Scottish Open that he wants to play in the Olympics, would replace Johnson. The U.S. is allowed four players, the most of any country in golf, because they are in the top 15 in the world.This was not an easy decision for me, Johnson said in a statement released by his management company. But my concerns about the Zika virus cannot be ignored.The Zika virus can cause severe birth defects, including microcephaly, in which babies are born with abnormally small heads.Johnson said he and his fiancée, Paulina Gretzky, plan to have more children. They have an 18-month-old son, Tatum.I feel it would be irresponsible to put myself, her or our family at risk, Johnson said. I believe I am making the right decision for me and, most importantly, my family. While I am sure some will be critical of my decision, my hope is that most will understand and support it.The decision follows a meeting at the Bridgestone Invitational with USA Golf in which the leading four Americans were briefed on Zika and security concerns. Johnson had called it a productive meeting and said he was planning to play, although he still wanted a few more answers.Of the top four Americans, only two-time Masters champion Bubba Watson said he is going.Golf was last an Olympic sport in 1904 in St. Louis.Nine of the 13 players who have withdrawn are among the top 30 in the world: Day, Johnson, McIlroy, Adam Scott, Branden Grace, Louis Oosthuizen, Hideki Matsuyama, Charl Schwartzel and Shane Lowry.The Associated Press contributed to this report. Lorenzen Wright Jersey . Just as Montreal was settling into the first full working week of a new year, the Impact announced the appointment of their new head coach. Allen Iverson Grizzlies Jersey . PAUL, Minn. http://www.grizzliesbasketballpro.info/Lorenzen-Wright-Grizzlies-Jersey/ . PETERSBURG, Fla. Marc Gasol Grizzlies Jersey . There was no hesitation from the 40th-ranked Pospisil, from Vernon, B.C., who admitted that he cut back on his training sessions over the last few days to conserve energy as the long ATP season finishes next week at the Paris Masters. Bryant Reeves Grizzlies Jersey .Y. -- Sabres defenceman Tyler Myers had no intention of changing his hard-hitting style before taking part in a disciplinary hearing for his illegal check to New Jersey forward Dainius Zubrus head. COLUMBIA, S.C. -- Former South Carolina starting quarterback Lorenzo Nunez is leaving the Gamecocks.South Carolina coach Will Muschamp said Sunday that Nunez wants to transfer somewhere he can play quarterback.Nunez started two games at quarterback during his freshman season in 2015, but exited his second start, against Missouri, with a shoulder injury. He played sparingly after that, then was shifted to wide receiver after Muschamp took over as coach.In 2015, Nunez completed 32 of 52 passes for 3766 yards and three touchdowns, while rushing for 375 yards with two more scores.dddddddddddd.Muschamp said he was disappointed in Nunezs decision, because he thought the 6-foot-3 sophomore could help the Gamecocks offense going forward. But Muschamp said Nunez wants to be a quarterback.Freshman Jake Bentley has been South Carolinas starting quarterback the past six games. ' ' '