Was a regular top 15 competitor in the AMA Supermoto Championship.
Finished 4th o/a in 2007 on a BMW HP2 Megamoto in the 1200cc Class.
In 2006 finished 3rd o/a while winning the Supermoto class at the 84th running of the US hill-climbing classic at Pikes Peak in the Colarado Rocky Mountains.
Greg and his brother Gary are very close. They used to travel the motorcycle race circuit together and both are very fast racers.
Greg #555 and Gary #357 are "Team Silent H".