Kenyan Moses Mosop, second at Boston in 2011, also announces withdrawal from race.
Spend some time going down. Your legs will thank you.
The injured marathoner believes he'll be back up to speed soon.
Injury has forced Ryan Hall to pull out of the NYC Marathon. Can amateur runners learn anything from his struggles?
The running community has a lot to say about Ryan Hall's decision to pull out of the NYC Marathon.
The two-time Olympian is battling a hip injury.
She's a three-time Olympic Trials finalist and will debut in the half marathon there.
The new Boston-based training group will be made up of elite level U.S. athletes.
Here's a look at how pro runners fuel before, during and after a race.
The 30-year-old is prepping for this November's ING New York City Marathon.