Rupp, Meb Keflezighi and Jared Ward round out the U.S. Olympic marathon team that will compete in Rio.
The 29-year-old marathon debutant will change the dynamic of the men's race on Saturday.
The 29-year-old will make his debut on American marathoning's biggest stage.
The U.S. star now decides if he will run the Olympic Trials marathon in February.
Reigning world and Olympic champion Mo Farah survives another scare.
Alberto Salazar responds to doping allegations made against him by the BBC, ProPublica, and former athletes and staff members.
Accusations from an assistant coach and former Nike athletes surfaced this week.
We spoke with the ProPublica reporter following his bombshell story on Alberto Salazar and doping within the Nike Oregon Project.
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