California Chrome won Saturday's Preakness Stakes.
The Derby winner got a great start and only had to fend off Ride On Curlin in the stretch to win the second jewel of the Triple Crown.
He finished the 1 3/16 mile race in 1:54 4/5, the fastest time since Curlin won in 2007.
"He's such an amazing horse," said winning jockey Victor Espinoza.
There were 10 horses in the 1 3/16-mile Preakness field, only three of which ran in the May 3 Kentucky Derby.
The last Triple Crown race is the June 7 Belmont Stakes at Belmont Park in Elmont, N.Y. At a mile-and-a-half, it's the longest of the Triple Crown races and is known as "The Test of a Champion."
Affirmed was the last Triple Crown winner in 1978. Since Affirmed swept the three races there have been 12 horses to win the first two legs but fail in the Belmont.
The dozen who missed since 1978: I'll Have Another (2012); Big Brown (2008); Smarty Jones (2004); Funny Cide (2003); War Emblem (2002); Charismatic (1999); Real Quiet (1998); Silver Charm (1997); Sunday Silence (1989); Alysheba (1987); Pleasant Colony (1981) and Spectacular Bid (1979).
Sunday Silence, Silver Charm, Real Quiet and Smarty Jones all finished second at Belmont Park.
The 11 Triple Crown winners: Sir Barton (1919; Gallant Fox (1930), Omaha (1935); War Admiral (1937); Whirlaway (1941); Count Fleet (1943); Asault (1946); Citation (1948); Secretariat (1973); Seattle Slew (1977) and Affirmed (1978).
Eddie Arcaro is the only jockey with two Triple Crowns (Whirlaway and Citation). Gallant Fox, the sire of Omaha, is the only Triple Crown winner to sire another.