Casse (born February 14, 1961) is a Thoroughbred racehorse trainer whose most notable horses include 2015 American champion turf mare Tepin and Canadian Horses of the Year Sealy Hill (2007), Uncaptured (2012), Lexie Lou (2014), Catch A Glimpse (2015) and Wonder Gadot.
He has won eleven Sovereign Awards for outstanding trainer in Canada and has been the leading trainer at Woodbine Racetrack 14 times.
In 2019, he won his first American Classic with War of Will in the Preakness Stakes.