Keflezighi is the oldest U.S. Olympic runner ever.
Amy Cragg won the U.S. Olympic marathon trials in 2:28:20 while helping her collapsed training partner Shalane Flanagan at the finish line.
Olympic sports now available on NBCSN, Universal HD (separate from Universal Sports Network), & streaming on NBC Sports Live Extra.
Shani Davis, a two-time Olympic 1000m champion, missed the podium at the World Single Distance Championships for the first time in his career.
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