American Pharoah won the Triple Crown in 2015, and was the 12th horse in history to win it.
Originally this was going to be a series of 11 models; however, Omaha, Whirlaway, Count Fleet and Assault were never produced. Since then, 2 additional horses have won the Triple Crown: American Pharoah in 2015 and Justify in 2018. Currently, there are 9 models in this series, and perhaps someday Breyer will release the others.