Jim Quirk, the executive director of the National Football League Referees Association since April 2013, is retiring.The NFLRA says Wednesday that Scott Green, a past president of the union and a retired NFL referee, will replace Quirk.Quirk, 76, has been associated with the NFL and the union since 1988, serving as an umpire in the league for 21 years. He worked one Super Bowl.I am very happy that Scott will succeed me, Quirk says. Ive been blessed to have had the opportunity to serve the NFLRA membership for over 12 years.Green, 65, joined the NFL officiating ranks in 1991 as a field judge, then moved to back judge before becoming a referee in 2005. When he retired after the 2013 season, Greens officiating career included three Super Bowls.---For more NFL coverage: http://www.pro32.ap.org and http://www.twitter.com/AP-NFLRobel Garcia Jersey . 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The Flyers have claimed three straight and four of the last five encounters with the Sens overall and Philly has won two in a row and three of its past four tests in Canadas capital city. Rafael Palmeiro Cubs Jersey . - Levi Browns tenure at left tackle for the Pittsburgh Steelers is over before it even began.World No 1 Jordan Spieth fired the worst first-round score of his professional career to fall 16 strokes off the pace at the Northern Trust Open. Spieth struggled to an eight-over 79 in scoring friendly conditions on Thursday, as Camilo Villegas fired a birdie-filled 63 to surge up the leaderboard and open up a three-stroke lead over the chasing pack.The world No 1 told reporters earlier in the week that Riviera Country Club was a course he was excited to return to, but he was noticeably off the pace on his way to recording his worst round since the 2014 Tour Championship. Spieth now faces a battle to avoid a first missed cut of 2016 after carding eight bogeys and one double-bogey in an error-strewn display, with the 22-year-old unable to think of an explanation for why his first round went so wrong. The world No 1s last missed cut came at the Deutsche Bank Championship I feel really confident about where my game is, and I had a great range session, Spieth told reporters. There was nothing pinpointed that was wrong.I just played really poorly from good positions off the tee and didnt strike the iron shots bad either. I just overdrew it when you cant be left and I overcut it when you cant be right. It was just bad timing.Having two-putted the first and tapped in the second, Spieth carded a three-putt bogey at the next and missed another par-save from less than six feet at the par-three sixth. Spieth spoke to a PGA Tour official after his ball ended being positioned near a sprinkler head at the ninth A solid 20-foot gain was quickly cancelled out by back-to-back blemishes to see Spieth reach the turn in 38, before the 22-year-old briefly halted the bogey run with a close-range birdie at the 10th.ddddddddddddAfter missing an opportunity from 10-feet at the par-five 11th, Spieths round quickly unravelled with four bogeys in a five-hole stretch, starting when a short putt lipped out at the 12th. Although Spieth recovered from another wayward tee shot at the 17th to leave a kick-in par, the world No 1 closed a day to forget with an uncharacteristic three-putt double-bogey at the last from less than 15 feet.The Masters and U.S. Open winner later said he had struggled adapting to a Riviera layout that had run firm and fast earlier in the week before it was softened by overnight rain.I found it very difficult to trust the way the golf course is playing, the 22-year-old added. Ive never played the golf course soft.Ive always played where you have to kind of float it on to the front of the greens and let it bounce, and I just never trusted the adjustment.Watch the Northern Trust Open throughout the week on Sky Sports 4 - your home of golf. Or watch from £6.99 without a contract, on NOW TV.Jordan Spieth features as part of the featured group coverage on Friday from 3pm. Also See: McIlroy makes strong start Northern Trust Open leaders Dougherty on Rorys regime Golf live on Sky Sports 4 ' ' '