The Latest on the Olympics ahead of the Rio Games (all times local to Rio):
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6:05 p.m.
The U.S. Olympic roster stands at 299, with more than 200 more athletes still to be named.
Alan Ashley, chief of sport performance for the U.S. Olympic Committee, says that as of Thursday afternoon, one short of 300 Americans had punched their tickets to Rio de Janeiro.
He expects a team of 552 when all the qualifying is complete by mid-July.
Swimming trials are in full swing in Omaha, Nebraska, this week, while the track and field trials ramp up Friday in Eugene, Oregon.