The reigning Chicago and Boston Marathon champion will be eligible to compete again on Oct. 30, 2016.
The Kenyan was tested in late September before defending her Chicago Marathon title.
30 years ago today, Steve Jones took the marathon by storm.
The American runner recently finished fifth in the Chicago Marathon, matching her PR of 2:27:03.
The 29-year-old Hansons Brooks athlete ran a two-minute PR to finish as the top American at the Chicago Marathon.
Jeptoo is the first runner to win four consecutive Marathon Majors events. (c) 2014 Race Results Weekly, all rights reserved. Used with
The 2014 Chicago Marathon is expected to be one of the fastest yet, with runners like Kenenisa Bekele and Eliud Kipchoge aiming for a
Matt Llano discusses the process of coming out as a gay athlete and how that's helped him achieve some big racing breakthroughs in 2014.
Here are nine things you may not have known about the fastest marathoner in history.