Nobody has run more Rock 'n' Roll events than the 64-year-old Marine.
Jason Devaney provides a glimpse into what he was thinking during his first race of 2014.
More than 25,000 runners rocked the nation's capital on Saturday morning.
The 41-year-old claimed the first marathon victory of his career.
The 38-year-old defending champion is coming back from severe injuries.
Check out this assortment of images from the world of running!