ARCADIA, Calif | 21 horses have died at California track since late December

ARCADIA, Calif. (AP) — A filly that suffered a catastrophic injury during training Tuesday and was euthanized was the 21st horse to die this winter at a storied Southern California racetrack that will host the Breeders’ Cup world championships for a record 10th time this fall.

Seven deaths have occurred during races on the dirt oval at Santa Anita since the track’s winter meet began on Dec. 26. Five have occurred on the turf course and nine came during training on dirt.

The highest-profile horse to be euthanized was Battle of Midway, winner of the 2017 Breeders’ Cup Dirt Mile. The 5-year-old bay also finished third in the 2017 Kentucky Derby for Hall of Fame trainer Jerry Hollendorfer. The horse suffered injuries during a workout on Feb. 23.

Last week, Santa Anita was closed for two days while the dirt surface underwent extensive testing and was declared fit for racing.

Hall of Fame trainer Ron McAnally said 4-year-old filly Lets Light the Way “took a bad step or something” on Tuesday.

He said the injury was a shattered sesamoid in her right front leg.

Sesamoid bones provide anchor points for the two branches of the suspensory ligament. The bones are under stress each time a horse takes a step. Lets Light the Way was X-rayed and later euthanized.

“I think the weather has a lot to do with it,” said McAnally, whose wife, Debbie, owned the filly.

Santa Anita received 11 1/2 inches of rain and had unusually cold temperatures in February, but it’s unclear whether track conditions played a role in any of the fatalities.

The National Weather Service is forecasting 1 to 2 inches of rain in Los Angeles County starting Tuesday night and into Wednesday.

“Santa Anita has been a wonderful track, and they’ve done all kinds of tests,” McAnally said. “I don’t know what else they could do. It’s a fluky thing.”

Also Tuesday, Vyjack was pulled up after completing a five-furlong workout, according to trainer Phil D’Amato. The graded stakes-winning 9-year-old gelding was vanned off the track. But D’Amato told the Daily Racing Form that Vyjack “took a couple of funny steps” and was OK.

The number of deaths has drawn both concern and criticism. A handful of animal-rights activists gathered outside Santa Anita’s main gate on Sunday, carrying signs and shouting.

In 2017, 20 deaths occurred among a total of 8,463 starts over a span of 122 racing days at Santa Anita, according to the most recent figures compiled by The Jockey Club.

There were 1.61 deaths per 1,000 starts in the U.S. in 2017, according to the most recent figures from the Equine Injury Database, compiled by The Jockey Club. That was a slight increase in the rate of fatal injury compared with 2016, when there were 1.54 deaths per 1,000 starts.

The majority of those deaths occurred on dirt surfaces (1.74 per 1,000 starts) compared to turf (1.36).

Track officials had already announced that Thursday’s racing was canceled and racing would not resume until Friday, although the track is open daily for training.

The track will host a major day of racing Saturday, including the $600,000 Santa Anita Handicap for older horses and the $500,000 San Felipe Stakes for 3-year-old Kentucky Derby hopefuls.

Santa Anita was closed for two days last week while the dirt surface was tested.

Mick Peterson, a soil and safety expert brought in from the University of Kentucky, proclaimed the track “100 percent ready” to resume racing.

Peterson said radar verified that all of the silt, clay and sand, as well as the moisture content, were consistent throughout the track. Its dirt surface was peeled back 5 inches and reapplied.

Since Peterson’s comments, two horses have died, including McAnally’s filly. The 86-year-old trainer is one of the most respected in horse racing and has won three Eclipse Awards as the nation’s outstanding trainer.

Lets Light the Way had one win in four career starts and earnings of $18,500, according to Equibase. She last raced Feb. 2 at Santa Anita.

McAnally purchased the filly for $15,000.

The other death occurred Saturday during the third race when 4-year-old filly Eskenforadrink was in the lead. Jockey Geovanni Franco pulled her up with an injury to her front leg. The filly was taken off the track and later euthanized.

Track officials announced in a statement Tuesday that a former track superintendent is returning immediately to Santa Anita as a consultant on site as “a precautionary measure with regard to the condition of the one-mile main track.” The consultant, Dennis Moore, worked in Arcadia from 2014 until retiring Dec. 31. He currently holds the same position at Del Mar and Los Alamitos racetrack in Orange County.

In 2014, Moore oversaw a major renovation of the dirt surface using sand that was dug up in the coastal suburb of El Segundo for construction projects at Los Angeles International Airport. The sand was screened for foreign materials and large rocks.

At the time, track officials said the reddish-brown sand would ensure balanced drainage during periods of wet weather and a consistent, safe cushion for horses year-round. That’s important at Santa Anita, which added several additional weeks of racing to its schedule after the closure of Hollywood Park in Inglewood, California, in December 2013.

Tim Ritvo, chief operating officer of The Stronach Group, which owns Santa Anita, said in a statement last week, “We consider the safety and security of the athletes, both equine and human, who race at our facilities to be our top priority. All industry stakeholders, including our company, must be held accountable for the safety and security of the horses and we are committed to doing just that.”

By BETH HARRIS ,Associated Press