Twelve horses died during this year's Del Mar racing season.
That's up from five last year, according to our media partner, the North County Times.
The article says the new synthetic Polytrack was supposed to help prevent the deaths because of the cushioning it provides, even though some jockeys believed the track made their horses run slower.
"[The deaths] were bad luck," Del Mar CEO Joe Harper told the North County Times. "Some years you have three and some years you have 20."
The racing season ended last Wednesday.
Read the rest of the North County Times' article here.