Theriot wins six at Churchill

Jockey Jamie Theriot became the seventh rider in Churchill Downs history to ride six winners in a single day. He accomplished the feat Wednesday on only seven mounts, last achieved by Pat Day on Nov. 15, 1984, one of four times Day won six races on a single card in addition to a track-record seven-win day.

Julien Leparoux and Calvin Borel had six-win days during the Spring Meet last year, but Leparoux achieved his six wins from nine mounts on June 27, and Borel accumulated his from eight mounts on July 5.

Keeneland going HD

This fall, Keeneland will become the first racetrack in North America to provide live race coverage and limited simulcasts in high-definition format. Keeneland will debut HDTV with the opening of its 2008 fall meet on Oct. 3. HD broadcasts of Keeneland's live meet will be available via its on-track television monitors, infield LED tote board and certain HD-compatible telecasts, such as those produced by ESPN.

Cup Challenge adds races

The Breeders' Cup Challenge is adding four races that will give the winners automatic bids to the Breeders' Cup on Oct. 24-25.

The expansion of the ”Win and You're In“ format brings to 57 the total number of races in the challenge, more than double the number in 2007.

Three of the four added races are automatic qualifiers for the new Breeders' Cup Marathon, to be run at 1½ miles for 3-year-olds and up.

They are the Greenwood Cup at Philadelphia Park, the Cougar II at Del Mar and the Turfway Park Fall Championship at Turfway Park. The one-mile Tiznow Stakes at Louisiana Downs is a qualifier for the Breeders' Cup Dirt Mile.