The former Olympian finished 9th in a competitive field in Kentucky.
Mullingar horseman Joseph Murphy enjoyed an excellent weekend performance in the US.
The Olympian finished ninth in a highly competitive field at the five-star Land Rover Kentucky Three-Day Event.
On board Calmaro, Joseph performed well in Friday's Dressage, Saturday's Cross-Country and Sunday's Show Jumping rounds.
Joseph, who was the sole Irish representative at the event, described the result as "fantastic".