Derby, Oaks horses test clean

Post-race tests on samples pulled from horses running in the Kentucky Derby on Saturday and the Kentucky Oaks on Friday at Churchill Downs were all negative for prohibited substances, the Kentucky Horse Racing Commission said Tuesday.

The samples were tested by the commission’s laboratory, LGC Science Group in Lexington, for 1,500 substances under the so-called supertesting protocols. The laboratory expedited the testing, the KHRC said.

All horses entered in the Oaks and Derby also were subject to out-of-competition testing designed to look for illegal blood dopers and peptides. All those samples were negative as well, according to the KHRC.