RV Stewards' Report - Shawn Mathrick

Racing Victoria (RV) Stewards have received a report from Racing Analytical Services Limited (RASL) confirming that a prohibited substance has been detected in a blood sample collected from the Shawn Mathrick trained racehorse, Gathers No Stone.

The report relates to a pre-race blood sample taken from Gathers No Stone prior to running in the Corio Waste Management 4YO+ Maiden Plate over 1100 metres (Race 1) at Picklebet Park Werribee Racecourse on 14 May 2026, where the gelding finished fifth.

RASL reported that the blood sample was shown to contain a total carbon dioxide (TCO2) concentration in excess of 36.0 millimoles per litre in plasma, which is a prohibited substance in accordance with the Australian Rules of Racing.

The Racing Science Centre (RSC) confirmed that the reserve portion of the blood sample was shown to contain a TCO2 concentration in excess of 36.0 millimoles per litre in plasma.

Alkalinising agents, in accordance with the Rules of Racing, when evidenced by TCO2 at a concentration in excess of 36.0 mmol/L in plasma, are prohibited substances.

RV Stewards initially informed Mr Mathrick of the irregularity on 20 May 2026. Mr Mathrick has now been informed of the confirmatory findings and that the Stewards are continuing with their investigation.