Also in this week's Olympic notebook, Caeleb Dressel still in good form, golf teams announced.

Olympic champion Athing Mu’s hopes for a repeat title came crashing down during the first lap of the 800-meter final at U.S. track trials.

Ukrainian high jumper Yaroslava Mahuchikh won a gold medal to bring an emotional close to the track and field world championships.

Britain’s Josh Kerr pulled off the biggest upset of the world championships, outrunning heavily favored Jakob Ingebrigtsen of Norway to the line for a win in the 1,500 meters.

Allyson Felix came out of a brief retirement to help the women's 4x400 relay make the final at world championships.

Allyson Felix hasn’t run her last race after all.

Allyson Felix has “no regrets” after a seventh-place finish in the 200 meters of what was likely her final Diamond League meet.

Jamaican Elaine Thompson-Herah bested her gold-medal winning time in Tokyo at the Prefontaine Classic on Saturday, and Sha’Carri Richardson finished last in her return to the track after controversy.

Sha’Carri Richardson is set to compete again after missing the Tokyo Olympics because of a positive marijuana test.

A five-minute burst of action near the backstretch of the Olympic track served up the perfect snapshot of what is going right and all that is going wrong for the U.S. track and field team in Tokyo.

Teenager Athing Mu won 800m gold at the Tokyo Olympics, breaking Ajee Wilson's American record in 1:55.21 to give the U.S. its first Games title in the event in 53 years.

The 19-year-old phenom also took down the American record in her Olympic gold medal-winning win.

The 19-year-old will be hunting for her country's second gold in the event after Madeline Manning's triumph in 1968 and their first medal since 1988.