The hurdler and bobsledder is absent from Rio after trips to Beijing, London and Sochi.
The hurdler isn't at the Olympics, but she has jokes for her Twitter followers.
Sidelined U.S. soccer star is in the Olympic spirit.
He both played in Athens and London, but avoided Beijing.
Fueled by rivalry with Chad le Clos, Phelps celebrates and cries.
This is some comic relief from the drama of the Olympics.
Meet the 19-year-old U.S. swimmer who is calling out a Russian doper.
She's expected to break records, he's already broken records, and they're off to a commanding start.
Throwback to 6 of the most unforgettable moments of the 2012 Summer Games in London.
Five-time gold medalist dyes his hair gray ... or blue ... or white.