The
Classic was first run in 1984, when the
Breeders' Cup was inaugurated as a series of year-end championships. Unlike the Triple Crown races and the Travers Stakes, the Classic is not restricted to any age group and the Breeders' Cup has been hosted by several different tracks throughout its history. For the first 32 runnings of the Classic, the Grand Slam was not in contention. In 2015,
American Pharoah won the Triple Crown for the first time since 1978, making him the first horse eligible to compete for this configuration of the Grand Slam. Before the final race, sportswriter Bob Ehalt of
ESPN declared American Pharoah was competing for the "Grand Slam," coining the second configuration of the term which quickly became popular. Pharoah won the
Breeders' Cup Classic on October 31, 2015, and is the only horse to win this version of the Grand Slam. This version of the Grand Slam differs from the Travers version because the Classic has no age restriction. Whereas the Triple Crown races and the Travers Stakes only adjust weight based on the horses' sex, the Classic also adjusts each horses' weight based on their age, a rule known as
Weight for Age. Since the Breeders' Cup Classic was first run in 1984, most of the winners have been older than three-year-olds. Overall, fewer than half of the Classic winners of any age had entered any of the Triple Crown races when they were three-year-olds. Four horses,
Unbridled in 1990,
A. P. Indy in 1992,
Curlin in 2007, and
Authentic in 2020, have won the Classic and one Triple Crown race.
Justify is the only horse to win the Triple Crown and not compete in the Breeders' Cup Classic. His owners and trainer planned to run him in the
2018 Breeders' Cup Classic, but an injury was discovered in July and Justify was retired from racing. Three horses have won at least one Triple Crown race as a three-year-old and the Breeders' Cup Classic as a four-year-old.
Alysheba won two legs of the Triple Crown in 1987 and the Classic in 1988. Two other horses have won one Triple Crown race and the Classic as a four-year-old:
Ferdinand, winning the 1986 Derby and 1987 Classic, and
Drosselmeyer, winning the 2010 Belmont and 2011 Classic. In 1989,
Sunday Silence and
Easy Goer had a fierce rivalry, with both finishing in the top 2 each race. Sunday Silence beat Easy Goer by two-and-a-half lengths in the Derby, a nose in the Preakness, and a neck in the Breeders' Cup Classic. Easy Goer won the Belmont by eight lengths.
At least two wins Notes '''''' Winner of the Grand Slam Entered all four races & won multiple Won the Breeders' Cup Classic in four-year-old season after winning one or more Triple Crown races in three-year-old season == Quintuple Crown ==