FORT ERIE, Ont. – Uncaptured overtook River Seven in the deep stretch to win the $500,000 Prince of Wales Stakes on Tuesday night.

Uncaptured ran a controlled race, sitting well back before coming on late to claim the second jewel of Canadian thoroughbred racing’s Triple Crown in an unofficial time of 1:55.49 on a fast dirt track at 116-year-old Fort Erie Racetrack.

River Seven held on for second with Niigon’s Glory taking third in the six-horse field.

Dynamic Sky and Spring in the Air were both late scratches in the 1 3/16-mile race.

Uncaptured was Canada’s top horse and two-year-old male last year but claimed his first victory in five starts as a three-year-old in taking the $300,000 winner’s share.

Uncaptured also earned trainer Mark Casse his second straight Prince of Wales — he won last year with filly Dixie Strike and in 2009 with Gallant.

Queen’s Plate winner Midnight Aria didn’t run Tuesday night, leaving Wando as the last Triple Crown champion in 2003.

The final Triple Crown race is the $500,000 Breeders’ Stakes, a 1 1/2-mile turf event Aug. 18 at Toronto’s Woodbine Racetrack.