This is very unlikely - David Beckham is fit, but not the fittest in the teams he has played in, and Lance Armstrong is built for cycling not running - though when he retired from cycling he ran a few credible marathons, his best the 2007 New York marathon in 2:46:43 placing 232nd.
There are some unconfirmed rumors that some athletes have completed the test, such as David Beckham (football/soccer), Lance Armstrong (cyclist) and Neil Back (England rugby player), which is completing 23 levels on the commonly used version.
