The fastest marathoner of all-time won comfortably for the second year in a row.
Jason Hartmann leads the American contingent.
Defending champs headline the second annual event.
Emanuel Mutai will replace him on the Kenyan team.
Star-studded lineup will take to the streets of Boston later this month.
He defeated Gebre Gebremariam last year in the inaugural edition.
The Boston and New York Marathon champion expressed his disappointment. Even though he is arguably one of the best marathoners in recent
Geoffrey Mutai, the top-ranked marathoner in the world, will stay home.
The answer should be more clear after this weekend's London Marathon.
Geoffrey Mutai, the 2011 Boston Marathon champion who dropped out of this year's race due to cramping, talks to the press in the post-race