King Guillermo will be scratched from Saturday's Kentucky Derby after developing a fever on Wednesday afternoon, his trainer, Juan Carlos Avila, said on Thursday.
King Guillermo turned in a regular gallop on Wednesday morning, but did not train on Thursday morning. Avila said that the colt had developed “a little problem” and would be thoroughly examined by a veterinarian. He posted on his Twitter account just after 4:30 p.m. on Thursday that the colt would indeed need to withdraw from the race.