After retiring for a second time in 2011, Lance Armstrong, centre, in black, still occasionally rode in small events or charity rides such as this one in Pleasant Grove, Ala., on April 27, 2012.
After retiring for a second time in 2011, Lance Armstrong, centre, in black, still occasionally rode in small events or charity rides such as this one in Pleasant Grove, Ala., on April 27, 2012.

Lance Armstrong says he has had 'enough' and will not pursue arbitration