BMX legend Mirra was found dead in a vehicle in North Carolina on Thursday afternoon in what police are investigating as an "apparent suicide", according to police. His 24 medals tie him for the second most of all time, according to the network.
Aside from his stint as a former BMX biker, where he was once the record holder as having won most number of medals, Mirra also hosted two seasons of the show "Real World/Road Rules Challenge" on MTV.
In 2000, he became the first park rider to land a double backflip in competition, and has topped nearly every major podium at least once.
Mirra started his career as a BMX rider with GT Bicycles but was recently taking part in endurance cycling events.
ESPN reported there was talk about Mirra making a return appearance to the BMX Vert ramp at X Games Austin this year. "He had been visiting friends in the area a short time before the incident", the police statement said. An accomplished athlete in both sports, Mirra was an "inspiration", Triathlon Magazine said, to athletes in the cycling and triathlon worlds.
Thomas said while Mirra was known on the world stage, Mirra was to many in Greenville "just a dad, just a friend".
Greenville Mayor Allen Thomas and Greenville Police Chief Mark Holtzman spoke at a Friday morning press conference.
USA track and field athlete, Olympian Coby Miller wrote on the BBC News Facebook page: "This is really sad!" Never back down. Love you all.
Mirra is married to Lauren, and the couple has two kids, Mackenzie and Madison.