A 45-year-old Miami, Florida, cyclist has accepted a two-year suspension from cycling after refusing to submit a sample at the USA Cycling masters national track championships in July, the U.S. Anti-Doping Agency announced Thursday.

Roger Hernandez refused to take part in a doping control test at the event.

He accepted a two-year period of ineligibility, which began on August 21, the day after he last competed. Hernandez is also disqualified from all competitive results obtained on and subsequent to July 29, 2011, the date upon which he refused to submit to sample collection.

According to the USA Cycling website, Hernandez medalled in three events at the championships, including a silver medal in the sprint.