A recent study by researchers from Colorado State University and the University of Rhode Island analyzed FEI data from 2014 to 2024 to assess the impact of breed on performance in CCI5* eventing. The study found that thoroughbreds are not at a disadvantage overall compared to other breeds, with no significant difference in overall penalties or completion rates. While thoroughbreds tend to incur more dressage penalties, they excel in the cross-country phase, being significantly more likely to jump clear within the time than non-thoroughbreds. However, non-thoroughbreds are twice as likely to jump clear in showjumping. The researchers concluded that breed bias against thoroughbreds should be reconsidered when selecting eventing prospects.

The study also highlighted a notable decline in the number of thoroughbreds competing at the five-star level in recent years, especially among British, German, and Irish riders. This trend may be influenced by factors such as cost and accessibility, with riders in countries like the US, Australia, and New Zealand more likely to use former racehorses due to affordability. The findings emphasize the importance of evaluating horses based on individual merit rather than breed stereotypes, with further research suggested into rider experience, funding, and the influence of thoroughbred blood in warmbloods. Meanwhile, initiatives like the Cornbury Racehorses Eventing Challenge aim to promote the versatility and value of thoroughbreds in eventing.