9:24 PM ET Associated Press Urine testing of Kentucky Derby winner Medina Spirit has shown that a steroid present in the colt’s system came from a topical ointment and not an injection, according to an attorney for trainer Bob Baffert. Medina Spirit tested positive for the steroid betamethasone after winning the May 1 race and

2:00 PM ET Associated Press SACRAMENTO, Calif. — All samples collected from horses competing in the Breeders’ Cup at Del Mar have tested clear. The Kenneth L. Maddy Equine Analytical Chemistry Laboratory at UC Davis announced the results Thursday. All horses competing in the world championships last weekend were tested for total carbon dioxide levels

9:48 AM ET Associated Press The nascent Horseracing Integrity and Safety Authority on Thursday released a draft of proposed anti-doping and medication control rules designed to bring uniformity to a sport that has operated for years under patchwork regulations in 38 racing states. Since July, HISA has been working with the U.S. Anti-Doping Agency to

9:30 PM ET Associated Press DEL MAR, Calif. — Knicks Go burst into the lead out of the starting gate and kicked away to a 2¾-length victory in the $6 million Breeders’ Cup Classic on Saturday at Del Mar. No one seriously pressed the colt, who earned his fourth straight victory and in the process

8:51 PM ET Associated Press DEL MAR, Calif. — Corniche won the $2 million Breeders’ Cup Juvenile by 1 3/4 lengths at Del Mar on Friday, stamping the colt as the early favorite for next year’s Kentucky Derby at Churchill Downs, where his trainer, Bob Baffert, has been banned. Sent off as the 7-5 favorite,

6:36 AM ET The 38th edition of the Breeders’ Cup will kick off two days of action Friday afternoon at Del Mar. A lot of eyes will be on the Breeders’ Cup Classic, and with so many high-profile races in the mix, there are numerous opportunities to wager on horses that offer significant value. Chris

5:14 PM ET Associated Press DEL MAR, Calif. — For the first time, all 14 Breeders’ Cup races this weekend at Del Mar will be run without race-day medication, the final step in a process that had the antibleeding medication Lasix prohibited in races for 2-year-olds at last year’s world championships. Irish trainer Aidan O’Brien

3:44 PM ET Associated Press DEL MAR, Calif. — A 2-year-old filly was fatally injured in an accident during training hours at Del Mar on Wednesday. Del Mar Thoroughbred Club President Josh Rubinstein announced the death during a safety briefing for the Breeders’ Cup, which will be held at the track north of San Diego

1:42 AM ET Associated Press ARCADIA, Calif. — A 4-year-old filly died from an injury suffered during training at Santa Anita on closing day of the track’s fall meet. Star of Africa was listed as suffering a non-musculoskeletal injury Sunday on the California Horse Racing Board’s website. She had three wins in 16 career starts

9:24 PM ET Associated Press Knicks Go is the early 5-2 favorite for the $6 million Breeders’ Cup Classic this weekend at Del Mar. The two-day world championships drew 169 horses from eight countries, including 46 foreign horses to the seaside track north of San Diego. Del Mar is hosting for the second time in