The 2:29 marathoner continues to train hard with her second child on the way.
The multi-year agreement a "game-changer" for both upstart organizations.
The 32-year-old captured his fifth Rock 'n' Roll Marathon Series victory on Sunday night.
American Ben Bruce won the men's race in 2 hours, 22 minutes and 38 seconds while Quebec’s Joanne Normand took the women's title in 3:01:27.
Twenty-three-year-old Anna Corrigan runs 2:44:28 to win her debut marathon.