Champion Nitrogen’s two-length win in the $2 million Longines Breeders’ Cup Distaff Oct. 31 at Keeneland was an emotional ride for Samantha Bussanich, director of communications for trainer Mark Casse’s Casse Racing. A fan favorite and a beloved filly in the Casse barn, the 4-year-old Medaglia d’Oro filly needed to grind out a hard-fought win against tough competition to earn her fourth win in seven starts this year.
After winning the Sovereign Award as Canada’s champion 2-year-old in 2024, and the Eclipse Award as champion 3-year-old filly last year, Nitrogen has competed at nine different tracks throughout her career for owner D. J. Stable and captured the hearts of everyone who has worked with her. Nitrogen is a strong candidate to win the Eclipse Award as 2026 champion older dirt female and plans call for her to remain in training in 2027.
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