DEL MAR, Calif. – All Silentio has known in his 13-race career is racing on turf, with two graded stakes wins and a third-place finish in the 2013 Breeders’ Cup Mile at Santa Anita among the highlights.

This weekend, there will be a change. Trainer Gary Mandella will run Silentio in Sunday’s $250,000 Pat O’Brien Stakes over seven furlongs on Polytrack instead of the $250,000 Del Mar Mile on turf the same day.

DEL MAR, Calif. – Bad Read Sanchez, third in the Grade 2 Best Pal Stakes on Aug. 3, will miss the $300,000 Del Mar Futurity on Sept. 3 because of a recent temperature, trainer Doug O’Neill said.

Bad Read Sanchez will be pointed for the $300,000 FrontRunner Stakes over 1 1/16 miles at Santa Anita on Sept. 27.

The sun shined bright on the large crowd at last Saturday’s Canadian Derby, and the future of horse racing in Alberta also is looking bright. According to Northlands general manager Chris Roberts, through last Saturday, the all-sources live handle of $12,553,482 was up 6 percent despite the track having raced only 44 days, compared with 50 days at this point last year.

Horse racing is a family business, with sons often following fathers.

Richard Lewis took that big step Friday at the Humboldt County Fair in Ferndale, where he took his place in the stewards’ stand. His father, Leon Lewis, was a longtime steward.

Richard Lewis recently was accredited as a safety steward but took his place in the stand for one day when Grant Baker had to conduct an informational event for state workers at Golden Gate Fields.

If there’s a hallmark of 21-year-old jockey Kyle Frey’s career, it’s resiliency, but that trait is facing its sternest test yet as Frey returns to action following a 90-day suspension May 2 through July 30 after testing positive for “synthetic cannabinoids: spice.”

As he has done in the past, Frey is meeting his issues head on and is determined to overcome it.

AUBURN, Wash. – While the field for Sunday’s Grade 3, $200,000 Longacres Mile took shape around him, likely favorite Stryker Phd went through his final paces this week at Emerald Downs.

In his final serious tune-up, he zipped four furlongs in 46 seconds Sunday, after which trainer Larry Ross pronounced him “pretty much ready” for a smashing effort in the Northwest’s richest race.

“He had a great work,” Ross said of the late-running Stryker Phd. “I had him in 46 and 2, and he galloped out in 58 and change. He’s had three works now, and he’s pretty much ready.”

The Louisiana Quarter Horse Breeders Association Futurity, a restricted Grade 1 event worth an estimated $1 million, highlights an expanded stakes schedule for the 2014 fall Quarter Horse racing season at Evangeline Downs, which begins Oct. 1.

Total purses for the 2014 stakes schedule are approximately $1.5 million, an increase of more than 7 percent from last year. There are 13 black-type events, up from seven last year.

Trials for the $150,000-added Louisiana Quarter Horse Breeders Association Sales Futurity took place at Fair Grounds last Friday, which was opening day for the 12-program Quarter Horse meeting. The 350-yard final is slated for closing day, Sept. 5.

Heza Louisiana Dash posted the fastest qualifying time of 17.331 seconds in winning the ninth of the 10 trials. The Kenny Roberts charge knocked off Louisiana Jambalaya, who posted the second-fastest time of 17.387 in winning the second heat of the afternoon.

DEL MAR, Calif. – Jockeys Corey Nakatani and Elvis Trujillo have agreed to a three-round exhibition boxing match at Del Mar after the races Aug. 30 to aid the Permanently Disabled Jockeys Fund.

They will have a weigh-in between races Aug. 29.

Del Mar is playing host Aug. 30 to six other fights, with the main event a professional bout between WBC Caribbean champion Ruben “El Cobra” Garcia (10-0, five knockouts) of Cancun, Mexico, and Javier “El Bravo” Gallo (21-9, 12 knockouts) of Buena Park, Calif.

For information on the fights, go to ringsideatdelmar.com.

DEL MAR, Calif. – Less than a month after undergoing knee-replacement surgery, Hall of Fame jockey Gary Stevens was a morning visitor to Del Mar on Tuesday and said his rehabilitation was going a bit better than expected.

“I think it’s going to be quicker than everybody thought,” Stevens said.

When he first had the surgery, Stevens said he hoped to be back riding by January if his knee cooperated. But that decision is still several months away.