Mancebo was himself implicated in Operación Puerto and was pulled from that year’s Tour de France on the eve of the race. Contrary to reports circulating at the time, Mancebo denies that he ever retired after news of the affair broke. “I never retired. Some journalists said I did, but that never happened,” Mancebo told Cyclingnews. “I changed my focus.”
In the 2009 season, he rode with the team Rock Racing. For 2010 he rode with Heraklion Kastro-Murcia and with the Canyon Bicycle's Team in the Tour of Utah, in an effort to defend his overall classification title. In 2011, he rode with the Realcyclist.com Cycling Team, where he was the #1 rider in the NRC standings. For 2012 he rode with the Competitive Cyclist Racing Team repeating as the NRC Champion and named Stage Racer of the Year by VeloNews. 2013 saw Mancebo ride under the colors of 5-hour Energy.