evidence: BEIJING -- A proposal to let professional fighters compete in the Rio de Janeiro Olympics is "ridiculous'' and "foolish,'' former heavyweight champion Mike Tyson said Wednesday. In Beijing to promote professional boxing in China, Tyson said any pro boxers going to the Olympics should be prepared to lose because the amateurs could prove too fast for them. [...] Tyson said he still has strong memories of the speed and skill of boxers from Cuba, Russia and elsewhere he fought as an amateur in the 1980s.