Meet Oswald van de Leeuwerk: Easy to Spot in the Ring and a Prankster in the Barn
by Danielle Henson/US Equestrian Communications Dept. | June 21, 2026
There is a reason Grier Van Rooyen's barn nickname for Oswald van de Leeuwerk is Ozzy. The 2014 Belgian Warmblood (Indouglas van het Bevrijdthof x Persinaa), owned by Calogera Borrello, has a rockstar personality as big as his jump. Van Rooyen and Oswald van de Leeuwerk (©US Equestrian) Van Rooyen grew up around horses from the start. Riding runs in the family as her mother rides, and Grier was in the saddle by age four. She grew up in Wyoming where she and her mother spent time in












