Days after her death on Sept. 25, former California Polytechnic State University graduate and track star Shelby Daniele’s alleged cause of death was shared by a family friend.

In June, Daniele posed with a large smile alongside her parents as she celebrated graduating with her master’s degree in agriculture with distinction.

Shelby Daniele, a track and field star at Cal Poly, died suddenly last week and her cause of death has been revealed to be from a brain aneurysm, according to one of her teammate's father

Shelby Daniele had been a top performer on the track-and-field team since 2020. She holds the school record in the women’s indoor 200-meter and is a six-time All-Big West honoree and a two-time Big West champion, according to Cal Poly.

Former Cal Poly track and field star Shelby Daniele reportedly died from a brain aneurysm following the 23-year-old stand-out athlete’s death on Wednesday. Daniele’s cause of death was revealed last week by the father of a fellow athlete attending the California NCAA Division I school, Brian Brandenburg, in a Facebook post last week.

Shelby Daniele had been a top performer on the track-and-field team from 2020 to 2024. She holds the school record in the women’s indoor 200-meter and is a six-time All-Big West honoree and a two-time Big West champion, according to Cal Poly.

Former collegiate track star Shelby Daniele has died. She was 23. Daniele was previously a sprinter for California Polytechnic State University’s track and field team. Her death was announced by the school’s athletic department on Friday7.

As friends and family continue to mourn the loss of Shelby Daniele, more details about the 23-year-old former track athlete's sudden passing have been revealed. The father of one of Shelby's close friends,