King Guillermo (Uncle Mo), who would be making his first start in over four months in Saturday's GI Kentucky Derby at Churchill Downs, did not go to the track Thursday morning, as reported by Greg Hall, an assigned pool reporter for the National Turf Writers and Broadcasters.
While refusing to reveal any specifics, trainer Juan Carlos Avila told Hall: “We have a little problem. We have to wait until afternoon.”
Avila told Hall there would be a meeting to speak with vets and that there “may be additional information” later today.
“It's a big race and a little problem is a big problem for me,” the Venezuelan told Hall.
The GII Tampa Bay Derby winner, King Guillermo was last seen fighting his way to a runner-up effort in the GI Arkansas Derby May 2.