The Texas Racing Commission has summarily suspended trainers Juan Diaz Jr. and Toby Keeton for “allegedly” incurring “multiple positive tests” for the Class 1 medication carmoterol, according to rulings obtained by Daily Racing Form. The rule violation category is listed as use of prohibited substances, which is a third-degree felony in Texas. The rulings are posted on the website of the Texas Racing Commission and dated Jan. 30, 2025. Diaz and Keeton were granted seven days from the ruling date to request a hearing. Both have asked for one, with the date to be determined, according to Amy Cook, the executive director of the Texas Racing Commission. The violation date for both rulings is listed as Sept. 14, 2024. Carmoterol is a bronchodilator, and the California Horse Racing Board’s website recently posted rulings for the medication in three Quarter Horses trained by Monty Arrosa. :: Access the most trusted data and information in horse racing! DRF Past Performances and Picks are available now. In Texas, a supplemental ruling on Keeton dated Jan. 30, 2025, read: “Twenty three horses under Mr. Keeton’s training supervision during the Lone Star Park Quarter Horse meet had positive drug tests for the Class 1A substances Carmoterol and d-Methamphetamine, which allegedly influenced the outcome of multiple races.”  The violation dates are listed as Sept. 27-Nov. 16, 2024. The ruling accessed on the website did not any list horse names or races. Similarly, a supplemental ruling on Diaz dated Jan. 31, 2025, and posted Monday afternoon read: “Twenty-five horses under Mr. Diaz’s training supervision during the Lone Star Park Quarter Horse meet had positive drug tests for the Class 1A substance Carmoterol, which allegedly influenced the outcome of multiple races.” The violation dates are listed as Sept. 7, 2024-Nov. 9, 2024. There are no horse names or races listed. Daily Racing Form was unable to leave a voicemail for Keeton on Monday, but sent a text requesting comment. John Mac Hayes, an attorney representing Diaz, provided the following statement to Daily Racing Form:  "Juan denies any rule violation. He has not been provided legal notice under the Texas Rules of Racing. He has never been given any lab report or other document alleging a rule violation. All we know is Texas says Juan is immediately suspended. Through a September 2024 date reference, the document Texas served indirectly suggests a positive test after a Dash For Cash trial race last fall. No rule compliant notice has occurred. We have no other information." Daily Racing Form left a voicemail for the stewards, currently at Sam Houston, but a receptionist said they were not believed to be in the office Monday. Daily Racing Form also requested any rulings for carmoterol in the last six months in Texas, and Cook addressed that request in a phone interview Monday. “Carmoterol is a newly detected substance, so we have not had any previous rulings,” she said. “One of the major challenges in the horse racing community is if there are drug-testing challenges and we’re testing for certain substances, if those substances are altered, then of course I think all racing commissions work to try to determine whether there’s new substances being used to make sure we have integrity in racing. “In this particular case, the great folks that I hired – the veterinarians, the stewards, the investigators – have really worked well in partnership with our laboratory to discover the carmoterol substance being used. And we actually did not only have winning horses in our regular post-race testing – this is not out-of-competition testing. And then once we realized what substance we had, we actually went back and retested samples for purses that had not been released to make sure we did not have a continuing problem throughout the Lone Star Park meet last fall.” Nationally, Keeton and Diaz finished 2024 in the top two positions in earnings among Quarter Horse trainers. Keeton set a single-season record of $7,595,894, while Diaz, a perennial leading trainer in Texas, earned $4,591,618. Keeton dominated the Labor Day program at Albuquerque last September, winning the $1,041,017 All American Derby with Dashing Tres, the $3 million All American Futurity with Hezgothelook Z, and the $250,000 All American Gold Cup with Jess Good Wine. Runners trained by Keeton swept the first three positions in the All American Derby. Hezgothelook Z swept the three major futurities typically run at Ruidoso Downs, winning the Ruidoso and Rainbow futurities earlier in the year. The All American Futurity was moved to Albuquerque after severe flooding hit the Ruidoso Downs racetrack last July. :: Want to learn more about handicapping and wagering? Check out DRF's Handicapping 101 and Wagering 101 pages.