A large and growing number of prominent Thoroughbred owners and trainers have voluntarily pledged to make veterinary records of their horses competing in graded stakes races in the United States and Canada available to the public, The Jockey Club announced April 17.

Such records will cover the 14-day period preceding and including the day of each race and will be available on the day of the race at least two hours prior to post time. The pledges take effect immediately.

The current list of high-profile owners includes Frank Stronach's Adena Springs; John Amerman; Antony Beck; Gary Biszantz; Bill Casner; Claiborne Farm; Sheikh Mohammed's Darley and Godolphin; Adele Dilschneider; Dogwood Stable; Will Farish; Glen Hill Farm; Harris Farms; Stuart S. Janney III; Charlotte Weber's Live Oak Stud; Earle Mack; Josephine Abercrombie's Pin Oak Stud; Hiram Polk Jr., MD; Phipps Stable; J. David Richardson, MD; Barbara Banke's Stonestreet Stables; Stella Thayer; Three Chimneys Farm; Tic Stable (Ian Highet); Terry Finley's West Point Thoroughbreds; Peter Willmott; WinStar Farm; and Woodford Racing (Bill Farish).

Trainers include Roger Attfield, Mark Casse, Christophe Clement, Neil Drysdale, D. Wayne Lukas, Richard Mandella, Michael Matz, Shug McGaughey, Ken McPeek, Graham Motion, Bill Mott, John Shirreffs, Al Stall Jr., Dallas Stewart, and Ian Wilkes