Date: 2006-Present

Lance Armstrong is a medically-gifted, freak athlete. Just to give you an idea, Armstrong's aerobic capacity, which measures the body and its ability to transport oxygen, is double that of a normal person. So, with those type of physical attributes, it only made logical sense for Lance to pursue other sports outside of cycling and he did just that.

In 2006, Armstrong competed in the 2006 New York City Marathon where he finished 856th. The following year, Armstrong returned to the same event and improved his time and ended up in 232nd place. Then, in 2008, Lance took part in the Boston Marathon where he finished in the top 500.

Most recently, Armstrong has taken on a new field of interest: triathlons. On February 12, 2012, Armstrong competed in the inaugural Ironman 70.3 Panama race. With anything having to do with cycling out of the question due to giving up on his doping allegations, Lance is now focused on qualifying for the 2012 World Ironman Championship in Kona, Hawaii. So, what's a one-sport athlete?