The field will be the third-largest in the 119-year history of the event.
McGillivray has completed his birthday run every year since turning 12.
One of the Boston Marathon champion's lifelong dreams will come true this evening.
The 2014 Boston Marathon champion will take on a variety of duties in his new role.
Meb Keflezighi and his historic Boston Marathon victory are nowhere to be found in the list of ESPY candidates.
The 33-year-old is aiming for a sub-2:20 marathon clocking this fall.
Charity runners at the April race brought in $38.4 million.
The field size of the 2015 race has yet to be determined.
We shot Meb Kelflezighi on location at Skechers headquarters in Huntington Beach, Calif., for the cover of our June issue.