Why? My first take...
'Kevin Eikleberry, a leading trainer, and others attributed the fatality rate to inferior horses. Because Turf Paradise revenues are relatively low, he said, purses are too small to attract top-flight animals.'
'Scott Stevens, a top jockey, agreed that Arizona gets "some of the lower-end claiming horses," which may account for deaths.'
https://www.azcentral.com/story/news...te/2585283002/