Q&A: Zirbel frustrated by USADA treatment

Tom Zirbel decided to retire from professional cycling last week after receiving a two-year suspension from the United States Anti-Doping Agency (USADA). The time trial specialist tested positive for Dehydroepiandrosterone (DHEA) from a urine sample taken by USADA following the USPro Championships on August 29, 2009.

Kirsten Frattini
Deputy Editor

Kirsten Frattini is the Deputy Editor of Cyclingnews, overseeing the global racing content plan.

Kirsten has a background in Kinesiology and Health Science. She has been involved in cycling from the community and grassroots level to professional cycling's biggest races, reporting on the WorldTour, Spring Classics, Tours de France, World Championships and Olympic Games.

She began her sports journalism career with Cyclingnews as a North American Correspondent in 2006. In 2018, Kirsten became Women's Editor – overseeing the content strategy, race coverage and growth of women's professional cycling – before becoming Deputy Editor in 2023.