Check this blog daily for all the latest updates on Kentucky Derby contenders and other news as the Run for the Roses is now just 23 days away.

Mo's reason: Eclipse Award winner Uncle Mo was suffering from a gastrointestinal tract infection when he suffered his first defeat in last Saturday's Wood Memorial. Following his perplexing third-place finish, the colt underwent a battery of tests, which trainer Todd Pletcher said are routine for horses in his barn who don't perform up to expectations. The results, released Thursday morning, revealed the infection. The colt is able to continue training while the infection is being treated and jogged a lap around Belmont's track on Thursday morning. Pletcher says the colt is still scheduled to ship to Churchill Downs on Monday morning and will have two works there before the May 7 Derby. Owner Mike Repole says if the colt isn't 100 percent, they'll skip the Derby and head straight to the Preakness.

Notes: San Felipe winner Premier Pegasus, who was favored for the Santa Anita Derby but forced to scratch because of a hairline fracture, will remain at trainer Myung Kwon Cho's barn at Santa Anita for two months before having his injured foreleg reevaluated. After that, he could go to a local farm to continue rehabilitation before resuming serious training in September.