Career
Five years later he returned to the sport he loved and began working as a trainer of show jumping horses and eventually was offered the chance to train thoroughbred race horses. Instant success led to training opportunities for other owners including for Frank Stronach and Kinghaven Farms where he met with his greatest success. In 2001, he set a record for most wins by a trainer in the Breeders" Stakes and in 2005 set the record for trainers by winning his fifth Prince of Wales Stakes.
At the 2008 Queen"s Plate, Attfield tied the record with Harry Giddings, Junior. as a trainer with eight wins.
Overall he has trained nearly forty Champions, six of which were voted Canadian Horse of the Year. In the United States, his horses race at Gulfstream Park in Hallandale Beach, Florida, the Fair Grounds Race Course, in New Orleans, Louisiana and at the Keeneland Race Course in Lexington, Kentucky.
In 1999, Roger Attfield was inducted into the Canadian Horse Racing Hall of Fame and in 2006, he was nominated for induction into the United States. National Museum of Racing and Hall of Fame. In 2011, Roger Attfield was inducted into the National Museum of Racing and Hall of Fame
In 2012, Roger Attfield was inducted into the Ontario Sports Hall of Fame.