NEW YORK -- A simple search on eBay reveals Heisman Trophy winner Johnny Manziel is far from the only college football player whose autograph is for sale. Pick a star and you can find memorabilia with a supposedly verified signature. South Carolinas Jadeveon Clowney. Ohio States Braxton Miller. Oregons DeAnthony Thomas. Louisvilles Teddy Bridgewater. Alabamas AJ McCarron. The list goes on and on. The difference is ESPN has reported the NCAA is investigating whether Manziel, the Texas A&M quarterback, got paid to sign autographs, which would violate amateurism rules. That has led to other schools being asked questions about whether their players earned money for signatures. If the allegations against Manziel, made by unidentified sources to ESPN, are proved true by the NCAA, his eligibility for the coming season could be in doubt as well as his status as a Heisman winner. ESPN reported that a top autograph authenticator had authenticated nearly 1,000 Manziel autographs. Brandon Steiner of Steiner Sports, which is the official collectible and memorabilia company of the NBA, the New York Yankees and Notre Dame, among others, said his company does not do business with college athletes. He said Manziel would likely be able to sign a contract with a collectibles company of at least $100,000 after he went pro. "I know there is a vibrant Heisman Trophy collectible audience out there," he said. A market flooded with Manziel autographs could cost him money later, Steiner said. "It creates market confusion and takes a lot away from the category," Steiner said Wednesday. Other college athletes might want to take note. Two sports websites -- bustedcoverage.com and goodbullhunting.com -- found what appeared to be dozens of authenticated items signed by Clowney online, and that led to questions for South Carolina officials. Associate athletic director Chris Rogers said Wednesday the schools compliance office has looked into the Clowney autographs on eBay and found no violations had occurred. "The websites that weve looked at and the pictures and autographs and items that weve found over the last academic year, weve not had any issues to suggest that anything impermissible had occurred," Rogers said. Ohio State athletic director Gene Smith said school officials have determined Miller had not profited from the numerous items found online with his signature. Smith said the quarterback signed many autographs at a Big Ten preseason kickoff luncheon. Presumably fans or memorabilia brokers then went and sold items they got autographed for free. "Weve already looked at it," Smith said. "Theres no issue there." Louisville came to a similar conclusion. "We are aware of many of the items for sale online that have been autographed by several of our student-athletes with remaining eligibility. As we are required to do by NCAA rules, we regularly review these items and send correspondence to the seller(s) requesting they remove the item for sale," the school said in a statement. "We have and continue to educate our student-athletes that it is not permissible to accept any type of compensation for their autograph or the sale of memorabilia. We have spoken with Teddy Bridgewater and we are comfortable that no violation has occurred." Clowney, Bridgewater and Miller enter the season has prime contenders for the Heisman. Manziel became the first freshman to win it last season. Its unclear if an NCAA violation would cause the Heisman trust to reconsider Manziels victory. Heisman Trusts rules state: "The recipient must be in compliance with the bylaws defining an NCAA Student-Athlete." "The Heisman Trust never comments on speculation," Heisman spokesman Tim Henning said Wednesday. 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Cuban testified Thursday that he was upset when the companys CEO told him news that would reduce the value of his shares, for which hed paid $7.5 million. But he said he did nothing improper when he sold those shares over the next two days. Adidas Zx 7000 Kopen . -- Three close looks at the bucket, three misses. Max Whitlock, gymnastics -- 6.28 p.m. BST?Max Whitlock became Britains first Olympic gymnastics champion when he produced a flawless routine on the floor apparatus for a surprise gold.Justin Rose, golf -- 7.46 p.m. BSTJustin Rose wrote his name into the history books when he claimed golfs first Olympic gold for 112 years.The world No. 12 edged out Open champion and Ryder Cup teammate Henrik Stenson -- who is also a neighbour in Lake Nona, Florida -- in a thrilling final-round battle at Reserva de Marapendi.The Briton carded a closing 67 to finish 16 under par and two shots ahead of Stenson, with American Matt Kuchar claiming bronze after a superb 63.The outcome was only decided on the 72nd hole when Rose pitched to three feet to set up a decisive birdie and Stenson missed his attempt from long range, the 40-year-old Swede also missing the return putt for par.Max Whitlock, gymnastics -- 8.13 p.m. BSTNot two hours had passed when Whitlock added a second gong on his favoured apparatus of the pommel horse, with British teammate Louis Smith claiming silver.dddddddddddd.Giles Scott, sailing -- 8.46?p.m.?BSTOn the water, sailor Giles Scott took an unassailable lead in the mens Finn class ahead of Mondays final race. Barring a protest, the 29-year-old will be presented with his gold medal on Tuesday.Jason Kenny, cycling -- 9.52 p.m. BSTJason Kenny claimed his fifth Olympic gold as Callum Skinner had to settle for silver in the mens sprint at the Olympic Velodrome.The 28-year-old Kenny beat his roommate Skinner 2-0 to join fellow cyclist Sir Bradley Wiggins and rower Sir Steve Redgrave on five career gold medals.Andy Murray, tennis -- 1.04 a.m. BSTHaving won his second Wimbledon title last month, Andy Murray battled to become the first tennis player, man or woman, to win two gold medals. A second U.S. Open title on the cards in the coming weeks? ' ' '