AKRON, Ohio -- Dustin Johnson is taking a leave of absence from golf to seek help for "personal challenges," a swift end to his season that will keep him from playing the PGA Championship, the FedEx Cup playoffs and the Ryder Cup. Jonathan Marchessault Golden Knights Jersey . In a statement Thursday from Hambric Sports Management, the 30-year-old Johnson said his leave of absence was effective immediately. It did not indicate how long he would be out, though agent David Winkle told the PGA of America he would not be at the PGA Championship next week or the Ryder Cup at the end of September. "I will use this time to seek professional help for personal challenges I have faced," Johnson said. "By committing the time and resources necessary to improve my mental health, physical well-being and emotional foundation, I am confident that I will be better equipped to fulfil my potential and become a consistent champion." He asked for privacy "as I embark upon this mission of self-improvement." Johnson, who tied for fourth in the U.S. Open and tied for 12th in the British Open, was No. 5 in the Ryder Cup standings and virtually certain to earn one of nine automatic spots when qualifying ends next week at the PGA Championship. As long as he stays in the top nine, he will be replaced by the next player in the standings. "We will certainly miss Dustin Johnson at Gleneagles, and we wish him the best," U.S. captain Tom Watson said. "As one of the longest hitters in the game with an undefeated record of 3-0 at Medinah in 2012, he has clearly been an asset for the United States team. That said, the United States is a team with an abundance of talent." Johnson was replaced in the PGA Championship by Jerry Kelly. Pat Perez is now the first alternate, and will get into the PGA provided the Bridgestone Invitational winner is already eligible. Johnson won the HSBC Champions in Shanghai last October at the start of the PGA Tours wraparound season. He has seven top 10s this year on the PGA Tour and was at No. 4 in the FedEx Cup standings. He will not be replaced in the 125-man field at The Barclays when the FedEx Cup playoffs begin Aug. 21. Its the second time in two years that Johnson has missed a major under curious circumstances. He pulled out of the Masters in 2012, saying that he tweaked his back while lifting a jet ski. He wound up missing three months, and won in his second tournament back. Johnson played in the final group in the third round of the British Open with Rory McIlroy, fading with a 71-72 weekend and tying for 12th. He missed the cut the following week at the RBC Canadian Open, and then withdrew from the World Golf Championship at Firestone. The PGA Tour, which does not comment on disciplinary action, offered little in a statement. "We have nothing to add to Dustins statement, but we wish him well and look forward to his return to the PGA Tour in the future," the tour said. Johnson is No. 16 in the world ranking with eight PGA Tour victories. He is the first player since Tiger Woods to go from college to winning in each of his first seven seasons on the PGA Tour. He lost a three-shot lead in the final round of the 2010 U.S. Open at Pebble Beach, closing with an 82. Later that year, he was assessed a two-shot penalty on the final hole of the PGA Championship for grounding his club in a patch of sand, not realizing it was a bunker at Whistling Straits. Johnson last year got engaged to Paulina Gretzky, the daughter of NHL great Wayne Gretzky. Cody Eakin Jersey . Cesar said the difficulties he went through after the 2010 World Cup helped him become "a better professional" and made him "more focused" on his career. He admitted that he took things for granted before the World Cup in South Africa, when he arrived considered the worlds top goalkeeper. Reilly Smith Golden Knights Jersey . The club announced Friday that Mauro Biello will be kept on as an assistant to coach Jesse Marsch when the Impact join the MLS in 2012. http://www.goldenknightssale.com/authentic-nick-holden-golden-knights-jersey/ . Canada Day is here and with it comes Free Agent Frenzy as the NHLs 30 teams storm out of the gate for signing season.The German football federation has opened proceedings against Cologne sporting director Jorg Schmadtke for throwing chewing gum toward the Hoffenheim coaching area during a Bundesliga game on Sunday. Schmadtke reacted furiously when Kevin Volland scored a late equaliser for Hoffenheim to salvage a 1-1 draw while a Cologne player, Lukas Kluenter, was lying on the pitch after what appeared to be a foul from Eduardo Vargas. Hoffenheim sporting director Alexander Rosen said Schmadtke phoned to apologise for his actions after the game and with that the issue is closed for uss. Deryk Engelland Golden Knights Jersey. But the Cologne director, who has already found himself in trouble with the authorities once this season, faces further investigation.Schmadtke was fined 6,000 euros by the federations sports tribunal in January for insulting match officials at half-time during Colognes game at Werder Bremen on December 2, when he shouted: You eggheads are getting worse from week to week! Also See: Bundesliga: Gladbach go fourth Hannover sack Schaaf Gotze must prove worth ' ' '