Experience will be favored as the first spots on the U.S. track and field team for the Rio Olympics are determined Saturday.
Both the men's and women's fields for the U.S. Olympic marathon trials in Los Angeles are led by three-time Olympians who are eager for another shot at gold. Meb Keflezighi and Shalane Flanagan were Olympic trials champions in 2012 and hold the fastest qualifying times heading into this year's race.
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About 370 men and women will compete beginning at 1 p.