 He rode one more season for the Coventry Bees before moving on to the Oxford Cheetahs and then on to Cradley Heath's bitter rivals the Wolverhampton Wolves in 2006 and 2007.2007 saw Hamill became USA National Champion for the fifth time, defeating Greg Hancock.Hamill retired from racing in Europe at the end of the 2007 and returned to his home in California.