(CNN) Hall of fame horse trainer Jerry Hollendorfer was banned Saturday from Santa Anita Park hours after one of his thoroughbreds died at the famed track.

American Currency , a 4-year-old gelding, was injured while exercising on the training track, Mike Marten with the California Horse Racing Board said.

It was the fourth horse trained by Hollendorfer to die this season at Santa Anita. Two other horses died at Golden Gate Field, a sister track to Santa Anita.

The action comes a day after CNN aired an investigation into horse deaths at Santa Anita and other racetracks around the country.

This is the 30th horse death at Santa Anita since this racing season began in December.

Read More