New York Road Runners announces the first 12 professionals that will compete in the November race.
American leads the race from the start to claim victory.
Check out some of the career highlights from one of America's top marathoners!
Check out these great shots from San Francisco's most fun race!
Ryan Hall takes second at the annual run in San Francisco.
It will be the American marathoner's second race of the 2013 season.
It will be his first race this year.
Kenyan is a dark horse to win Monday's race.
30-year-old American is in the midst of a comeback, and he hopes his hard work pays off in Boston.
The fastest American marathoner of all time has a quad injury.