2016 Olympics, track and field results: Allyson Felix wins 6th gold medal with 4x400 relay win

The men's and women's teams won gold in the 4x400, plus Matthew Centrowitz won the first gold for the US since 1908 in the 1500 meters.

U.S. women's track and field team keeps raking in medals in Rio Olympics

Felix makes sensational return to indoor 200m sprinting with 22.59 win in Fayetteville, REPORTS

Team USA Number 10: Five-time Olympian Allyson Felix Wins Bronze in 400 at Age 35

Olympics Rio 2016: Allyson Felix wins sixth gold as US win 4x400m relay, GB take bronze - Eurosport

Allyson Felix Wins Silver As The Bahamas' Miller Takes Gold In 400-Meter Final : The Torch : NPR

Team USA wins 6th straight Olympic gold in women's 4x400m relay

Rio Olympics: Allyson Felix upset by Bahamas' Shaunae Miller in women's 400 meters – Orange County Register

Track and field in better place after 2016 Rio Olympics - Sports Illustrated

Olympics 2021 recap: Americans win 4x400 golds, baseball loses

U.S. Track Team Caps Tokyo Olympics With Dominant Relay Wins - WSJ

The Latest: US women win 4x400 relay, Felix's 6th gold

In Final World Championships Race Allyson Felix Snags Medal No. 19 With Mixed 4x400 Team - Team USA

Allyson Felix road to gold at Tokyo Olympics: Preview, schedule, rivals