The 17-year-old high school senior turned professional last year and is now coached by Alberto Salazar.
The race is chock full of former champions, Olympic champions and course record holders.
American Jason Hartmann duplicates his fourth-place result from 2012.
Ethiopians rule the the roads in the Windy City.
In this special edition of RunCenter presented by adidas, Toni Reavis and Mario Fraioli analyze this year's unforgettable races at the Boston Marathon.