Allison Brock grew up riding in the state of Hawaii and moved to the mainland to pursue a career in dressage at 17. After working under direction of U.S. Olympic Medalist Sue Blinks for several years, Brock now serves as head trainer for Fritz and Claudine Kundrun at their Deer Meadow Farms. Brock and her mount Rosevelt moved up to the Grand Prix Level in 2013, finishing fourth in the Grand Prix Special at the Centerline Events at HITS-on-the-hudson CDI-W. They found success in 2014, with mulitiple national grand prix wins. Brock and Rosevelt won both the Grand Prix and Grand Prix Special at the Dressage at Devon CDI3*
In 2015, the pair finished first and second in the CDI-W Grand Prix and Grand Prix Special, during week one of the Adequan Global Dressage Festival. They scored another win in the CDI3* Grand Prix during week seven of the Adequan Global Dressage Festival. To cap-off their winter season, the pair helped USA I Team to victory in the Stillpoint Farm FEI Nations Cup CDIO3*. Heading overseas to compete for the first time, Brock rode Rosevelt to fifth place finishes in the CDI3* Grand Prix and Grand Prix Special at München-Riem. At CDI4* Achleiten the pair finished second in the Grand Prix and the Grand Prix Special.