Bred and raised by the Pabsts and Patricia Murphy, the son of Tribunal is a half-brother to Washington horse of the year and Longacres Mile (G3) winner The Great Face. Both are sons of stakes-placed Irish Toast, a recently retired daughter of Synastry and Washington champion Bix's Bet. Irish Toast was named Washington broodmare of the year in 2010.
One of five champions and a dozen stakes winners - including 2012 Washington most improved plater and stakes winner Kooky Saluki - sired by the late Tribunal, Atta Boy Roy was unraced at two.
At three he began his race career at Turf Paradise where he won his second start by 12 lengths. He next won an allowance at Canterbury Park and later ran second in the Luke Kroythosch Stakes at Turf Paradise in his first stakes placement.
The following year Atta Boy Roy, who was purchased by Roy and Ellie Schaefer out of the Blue Ribbon consignment at the 2006 WTBOA September sale and raced his entire career for the Schaefer's R.E.V. Racing, spent his summer at Emerald Downs where he won the Governor's Handicap and set a new track and state record in the Chinook Pass Sprint Stakes en route to being named both Washington and Emerald champion sprinter.
His five-year-old season marked a series of highs, including his victory in the $250,000 Grade 2 Churchill Downs Stakes on Kentucky Derby Day 2010 with Calvin Borel in the irons. He also won the $200,000 Remington Park Sprint Cup Stakes by 5 1/ 2 lengths and finished second in the Aristides Handicap (G3) and Iowa Sprint Handicap to earn his second Washington sprinter of the year award and he was also named top state older male runner.
At six he won the Shot of Gold Handicap at Canterbury and placed in both the Aristides Stakes and Iowa Sprint Handicap for the second times.
Overall, in 35 starts, the Valorie Lund-trained champion Boy Roy had a record of 14-7-1 with just shy of $600,000 ($595,416) in earnings.
Atta Boy Roy will stand the 2013 breeding season as property of the Atta Boy Roy syndicate for a fee of $2,000 live foal, with no booking fee.