I have been able to confirm the following dead athletes at American tracks this year:
Hot Caviar, killed at Fonner Feb 18. She was four years old.
Long Cool, killed at Fonner Mar 22. He was four years old.
Texas Star, killed at Lone Star Apr 19 (see this). She was three years old.
Lake Sense, killed at Chippewa Jun 22. She was six years old.
Vada’s Moon, killed at Chippewa Jun 22 (same race as above). She was three years old.
Western Charm, killed at Great Falls Jul 20. He was five years old.