Which retired, American champ won 19 of his 20 race career?

The correct answer was Zenyatta.

The famous Zenyatta, a retired, American champion, Thoroughbred racehorse, was trained by John Shirreffs & guided by jockey Mike Smith for 17 of her 20 starts. Winning 19 consecutive races in a 20 race career, she’s definitely a star in BEDMAX’s eyes!