The Louisiana State Racing Commission (LSRC) announced that Jeremy Derozin, who ranked 10th among the AQHA’s leading trainers of money-earners in 2024, has been suspended from racing in Louisiana

ALEXANDRIA, LA–JULY 14, 2025–At a meeting of the directors of the Louisiana Quarter Horse Breeders Association on July 11, 2025, the Louisiana State Racing Commission (LSRC) announced that Jeremy Derozin, who ranked 10th among the AQHA’s leading trainers of money-earners in 2024, has been suspended from racing in Louisiana after blood and urine samples from two of his horses tested positive for the prohibited substance carmoterol.

LQHBA Executive Director Bruce Salard informed TRACK Magazine on Saturday of the LSRC announcements at the Friday Board Meeting.  The LSRC maintained split samples from blood and urine tests from a race day in June 2024 at Delta Downs and available split samples from December 21, 2024, at Evangeline Downs.  These split samples were sent by the LSRC to the testing lab at the University of California – Davis for further analysis.

Purses for those races had been  originally cleared by the LSRC through the protocol at Industrial Labs in Colorado.  Subsequently through the Louisiana State Racing Commission’s use of the split samples, UC-Davis had built a profile to find carmoterol in test samples. When these samples were sent there for review, carmoterol was identified in samples from two horses, both trained by Jeremy Derozin and owned by Rogelio Marquez, Jr.

Derozin was suspended by the LSRC for one year – six months for each positive test.

The LSRC stated all horses trained by Jeremy Derozin were placed on the vet list and cannot be moved to another trainer without approval from the racing commission. Each horse will be subject to further blood and urine tests prior to moving to another trainer.

Furthermore, the LSRC has frozen the owner’s account and all purse money that was previously cleared (around $70,000) must be returned.

Due to the suspension, Derozin’s horses were scratched from several stakes races on Delta Downs on Saturday. These horses – all owned by Rogelio Marquez, Jr. – were scratched:

> San Lorenzo Bossman - $597,622 Lee Berwick Futurity RG1
> San Lorenzo Tempted - $154,230 Louisiana Bred Derby RG3
> San Lorenzo Chicken - $75,000 Louisiana Juvenile Stakes
> Into The Grey – $75,000 Louisiana Classic Stakes RG2
> San Lorenzo Firluais - $50,000 Nag Nest Stakes
> San Lorenzo Princess - $50,000 Flashy Hemp Stakes

Positive Hair Tests For Olodaterol Lee Berwick Futurity Entries

Two horses that qualified for Saturday’s $597,622 Lee Berwick Futurity were denied entry by the LSRC from participating in Louisiana’s second richest race  due to positive hair tests for the prohibited drug olodaterol after the futurity trials.

They were:

> San Lorenzo Cocoy – owned by Rogelio Marquez, Jr. and trained
    by Jeremy Derozin
> Valiant Heart Z – owned by Luis Armando Castellanos and trained
    by Patrick Clemons.
> Shes Jess Sixy and Puro Venenoo advanced to the futurity final
   after qualifying for the Louisiana Juvenile, the consolation for the
   Lee Berwick Futurity.

Olodaterol is a long-acting beta-agonist used in humans for treatment of airflow obstruction in patients with chronic obstructive pulmonary disease (COPD). The drug reportedly works by relaxing and opening air passages in the lungs, making it easier to breathe. It is normally administered in humans via an inhaler.