Vladimir Putin is denying Robert Kraft’s oft-told claim that the Russian president pocketed a prized Super Bowl ring during the Patriots owner’s visit to St. Petersburg, Russia, in 2005. Kraft has long alleged that Putin kept the diamond-studded Super Bowl ring but didn’t make a fuss at the request of then-President George W. Bush who wanted to avoid trouble with Russia. Kraft repeated the story at an awards event in New York the other night. “I took out the ring and showed it to [Putin]. And he put it on and he goes, ‘I can kill someone with this ring,’” Kraft told the crowd at the Waldorf Astoria. “I put my hand out and he put it in his pocket, and three KGB guys got around him and walked out.” Sunday, a Putin spokesman disputed that account. “What Mr. Kraft is saying now is weird,” said Dmitry Peskov. “I was standing 20 centimeters away from him and Mr. Putin and saw and heard how Mr. Kraft gave this ring as a gift.” The 4.94-carat ring is in the Kremlin’s library, where all official state gifts are kept, he said.