Graded-stakes winner Williamstown has died. The 25-year-old son of Seattle Slew was euthanized Feb. 25 due to complications caused by the neurologic disease equine protozoal myeloencephalitis (or EPM).

Williamstown had been pensioned at Old Friends, the Thoroughbred Retirement Farm in Georgetown, Kentucky, since 2007. Michael Blowen, founder and president of Old Friends, made the announcement of his passing this morning (Feb. 26).

As a racehorse, Williamstown (Seattle Slew – Winter Sparkle, Northjet) scored his biggest win in the 1993 Withers Stakes at Belmont Park in track-record time of 1:32.79 for owner Peter W. Willmott. It was considered one of the fastest miles in racing history.

Williamstown’s three-year career included wins in other stakes, and seconds in the Jerome Handicap and King’s Bishop, among others. In all, Williamstown won five of his 24 starts and earned $360,884. He was also successful as a stallion, siring 15 stakes winners, including graded winner Vinemeister