Presidential, Kupuna and Frosted Grace have each won a major stakes in the Southwest region in their last start and all could land at Lone Star Park this meet for the Grade 3, $400,000 Steve Sexton Mile.

The race is the centerpiece of a 41-date meet that opens Thursday night. The season will continue through July 14. The races again are unable to be simulcast to U.S. locales other than Texas racetracks due to an ongoing impasse between the Texas Racing Commission and the Horseracing Integrity and Safety Authority. Texas does not operate under the jurisdiction of HISA.

John W. Jacobs, a son of Hall of Fame trainer Hirsch Jacobs who won two Triple Crown races with horses bred in partnership by his father, died Wednesday at his home in Key Biscayne, Fla., surrounded by family members, according to his family. Jacobs, who had been suffering from a long illness, was 89.

Jacobs began working for his father in 1957, three years after Hirsch Jacobs had been elected to the Hall of Fame. In 1970, Hirsch Jacobs died in February, and the horses in the stable were transferred to John, including two top 3-year-olds, Personality and High Echelon.

George Weaver, a trainer based in New York, has been notified that a horse he trains, Anna’s Wish, tested positive for the banned drug metformin after finishing third in the Cicada Stakes on March 16 at Aqueduct, according to a notice posted on the website of the Horseracing Integrity and Welfare Unit on Thursday.

Phil Schoenthal, a trainer based at Laurel Park in Maryland who races throughout the mid-Atlantic and Midwest, has been provisionally suspended by the Horseracing Integrity and Welfare Unit after two of his horses tested positive for methamphetamine, a banned substance that is in the process of being re-categorized under HIWU’s rules.

Schoenthal declined to comment on the details of the positives on Wednesday morning, but he said he was in the process of gathering information to defend himself.

A Kentucky Circuit Court judge in Jefferson County has scheduled a hearing for Monday to consider a request for a temporary injunction that would permit Amr Zedan to start his horse Muth in this year’s Kentucky Derby despite a ban placed by Churchill Downs on the colt’s trainer.

The judge, Mitch Perry, scheduled the hearing after a brief appearance by attorneys for Zedan and Churchill Downs Inc. in his courtroom on Monday morning.

For the third year in a row, Breeders’ Cup will award credits toward the entry fees of six of its dirt races to runners in designated stakes races that are scheduled for the lead-up to the two-day event on Nov. 1-2.

The Beyer Speed Figure for the Grade 2 Risen Star Stakes run Feb. 17 at Fair Grounds has been upgraded by five points. Originally given a 90 for winning that race, Sierra Leone now has a 95. All other horses in the field also received a five-point upgrade.

The winning streak began rather anonymously during the lunch hour at Santa Anita on Saturday with a win aboard the well-regarded colt Ball Don’t Like in a maiden race for sprinters.

By mid-afternoon, the world-famous jockey Frankie Dettori had won six consecutive races, including two stakes, sweeping the second through seventh races.

Dettori was on the verge of equaling, and perhaps surpassing, the track’s all-time record of seven wins in a day set by Laffit Pincay Jr. in March 1987.

It was not to be.