Sebastian Coe has rejected claims that London 2012 may have been the dirtiest Olympic Games in history. Coe went on the offensive after another week of doping scandals rocked the Olympic movement.The International Olympic Committee announced on Thursday that 23 athletes who competed in London have tested positive from 265 retested samples. That is top of over 30 previous failed tests from competitors who had been caught either during the Games or since. The high percentage of apparent doping offences sparked suggestions on Friday that London was rife with cheating, but Coe denies that is the case.Lord Coe, now the president of world athletics governing body the IAAF, served as the London 2012 organising committee chairman. Lord Sebastian Coe denies 2012 was the dirtiest Games The former middle-distance track star claims in the Sunday Telegraph that at the time of the 1984 Olympics in Los Angeles, where he competed and won 1500m gold, technology was prehistoric and says many athletes would pick and base their schedules on the athletics circuit in large part on the avoidance of testing.The IOC has said its reanalysis programme is ongoing, with the possibility of more results in the weeks to come.Coe wrote in his newspaper column: It would be delusional to say the London Games was in the words of many yesterday dirtier than Games before.He added: The message from Friday was not only, or even actually, about interpreting trends.The big message was for athletes to recognise that just because they may be ahead of the testing technology at a particular moment in their career, it does not mean they can lie easily in their beds until excitable grandchildren pore over Olympic medals in their dotage.They will be caught. They will then have the discomfort of explaining to those grandchildren why they no longer possess those medals. More is being done to catch cheats than ever before. Anti-doping test samples We will not stop collecting data, sharing information, building profiles, developing testing techniques or calling out and prosecuting cheats in our efforts to protect and promote clean sport. The Rio 2016 Games will be cleaner for it. That should be the story.The new findings cover five different sports and six international federations, and were all based on intelligence-gathering that began in August 2015.Russia has said eight of its athletes are among the 23 to have tested positive on reanalysis.All athletes found to have infringed the anti-doping rules will be banned from competing at the Rio Olympics this summer. Also See: 23 positive after London retests Eight Russians fail retests Sharapova in Olympic squad GB may get 2008 medal boost Buy Cheap Old Skool . 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Cheap Old Skool Wholesale . -- Jimmie Johnson held off a teammate, passed a pair of Hall of Famers, and dominated once more at Dover. Vans Old Skool Cheap Online . Halladay signed a one-day contract with the Toronto Blue Jays on Monday that allowed the veteran right-hander to retire as a member of team with which he broke into the majors and spent the bulk of his distinguished 16-year career. INDIANAPOLIS -- Kyle Busch heard all about the potential to pull off a historic sweep at Indianapolis Motor Speedway.On Sunday, he accomplished the feat.Busch led a record 149 of 170 laps and beat teammate Matt Kenseth to the finish line in a second overtime to win his second straight Brickyard 400. Coupled with an Xfinity Series victory a day earlier, Busch became the first NASCAR driver to win both poles and both races on the same weekend.Ive never had a dominant car like this, Busch said after celebrating his fourth win of the season with his wife and son. This is obviously a special day and a special car.The impressive feat even overshadowed two other major story lines -- Jeff Gordons comeback and Tony Stewarts farewell.Stewart finished 11th in his final race at Indianapolis, while Gordon was 13th. Gordon came out of retirement to replace Dale Earnhardt Jr., who has battled concussion-like symptoms and has missed two consecutive races and will also sit out next week at Pocono. Gordon will replace him there, as well.Afterward the two drivers who grew up in Indiana drove side-by-side around the 2.5-mile oval one last time.I have gained so much respect and admiration for Tony, Gordon said. I love this guy. I have always respected his talent.Everybody respected Buschs talent this weekend, too.The reigning Sprint Cup Series champion, who used last years win at the Brickyard to jumpstart his title campaign, joined third-place finisher Jimmie Johnson as the only back-to-back winners of NASCARs race at Indy. Johnson won in 2008 and 2009.Busch surrendered the lead for 14 laps after his first pit stop, regained it when Brad Keselowski pitted, then gave it up again for only five laps when he made his second pit stop.Everyone else spent their day chasing Busch.The Joe Gibbs Racing Toyota was so strong that Roger Penskes drivers started with a strategy of trying stretch their runs long enough to make one fewer pit stop. It didnt work -- Joey Logano finished seventh and Keselowski wound up 17th.The only real challenge for Busch came with a series of late crashes that delayed his inevitable trip to victory lane.The crashes began when Carl Edwards car wiggled in the first turn on a restart with seven laps to go.dddddddddddd His car slid up the track, hitting Keselowski, as well as Ryan Blaney, Ryan Newman and Danica Patrick. The wreck brought out a red flag for almost eight minutes.On the ensuing restart, with three to go, Busch again pulled away only to have a collision between Trevor Bayne and Clint Bowyer behind him to send the race into first overtime.It happened again when Jamie McMurray slid through the first turn and into the wall on the next restart, but Busch pulled away one more time for a historic win in a race that actually took 425 miles.I certainly didnt want one, let alone five (overtimes) or however many there were, Busch said. We just wanted the race to go green till the end. We had a really good long-run car till the end, so I felt like wed be able to hold off all those guys behind us and then we had all those restarts.WHOS HOT: Joe Gibbs Racing and Toyota. The team had three cars finish in the top five and heads to Pocono with back-to-back victories. Toyota, meanwhile, had three of its cars place in the top four.WHOS NOT: Hendrick Motorsports. Yes, Johnson ended a four-race streak with no top-threes but nobody else finished in the top 10 and none of the four cars was even in contention for the lead.TOUGH WEEK: Greg Biffle wanted this weekend to be a tribute for his late father, who died Tuesday. Instead, Biffles day ended early after he crashed on Lap 52.EMPTY SEATS: Its tough to fill roughly 250,000 seats. But the estimated crowd of about 50,000 left plenty of seats empty at a race that has seen attendance steadily dwindle over the past eight years. The lone exception came in 2015 -- in what was supposed to be Gordons final ride.HE SAID IT: When Busch was asked whether his success over the past two years at Indy would prompt him to follow in the footsteps of his brother, Kurt, and run in the Indianapolis 500, Kyle Busch responded: Well, I wont be following in his footsteps, Ill be doing my own footsteps. It certainly may open up some avenues, Im not sure.UP NEXT: Pocono Raceway, July 31. 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