River Thames is the favorite for the Blue Grass Stakes, a key prep race for the May 3 Kentucky Derby at Churchill Downs. Other top contenders to watch

Burnham Square chased down East Avenue from the back of the pack and won by a nose in the storm-delayed $1.25 million Blue Grass at Keeneland, earning enough points to qualify for next month's Kentucky Derby.

Burnham Square was not supposed to win the Blue Grass Stakes nor be striding into the Kentucky Derby as the points leader. But he did and is doing just that. Here's how.