Mexico City medio Maraton

Osvaldo Aguilar/ RunCDMX

The celebrations at the 2024 Mexico City Half Marathon on Sunday came to a halt when a runner without a race bib collapsed and died at the finish line. The unidentified runner was immediately transported to a nearby hospital, where he arrived without vital signs. He was later identified as former Mexican national team sprinter Juan Stenner, who had represented his country at the 2011 Pan American Games in Guadalajara, Mexico.

According to a report from the Mexico City Sports Institute, the 32-year-old was not signed up for the half-marathon. He fainted suddenly after finishing, and was given immediate medical attention by the Red Cross and volunteers before being transported to hospital. The statement also mentioned that Stenner did not have a bib number or any other indication of his registration in the race.

Running without a race bib, also known as banditing, is extremely dangerous, especially in situations like these. Since the runner had not registered for the race, personnel were unable to identify him or quickly notify his emergency contacts.

Juan stenner
Juan Stenner competed for Mexico at the 2011 Pan American Games in the 400m hurdles and 4x400m relay. Photo: Mexsport

Stenner ran for the University of South Carolina in the NCAA from 2012-2014 and competed for Mexico in the 400m hurdles and 4x400m relay, finishing sixth at the 2011 Pan-Am Games. He retired from track and field in 2018 and had been distance running since. He was an avid half marathoner, participating in big city events like the NYC Half and the Mexico City Half in 2019.


More than 30,000 runners competed at the 17th edition of the city’s summer half-marathon. The men’s race was won by 18-year-old Kenyan runner Frederick Yeko Domongole in 64:37, and Joyce Chepkemoi Tele set a new course record in the women’s race, crossing the finish line in 1:10:34.