Win Willy, fourth-place finisher in the Arkansas Derby, was declared out of the Kentucky Derby by trainer Mac Robertson on the morning of April 29, hours before entries were to be taken for the May 2 race at Churchill Downs.

Robertson said an X ray taken Tuesday revealed a “line” in the left front fetlock that could or could not be a problem. So, to err on the side of caution, the connections decided not to enter the son of Monarchos in the Derby but to give him 30 days off. In his final Derby workout Monday, the colt got the five furlongs in 1:02 2/5.

The trainer said he decided to have the X rays taken because of the possibility there was a problem. Robertson said he was not disappointed that Win Willy will not make the Derby field, noting “the horse is more important.”

Trained by Robertson for the Jer-Mar Stable of Jerome and Marlene Myers, Win Willy was purchased for $25,000 at the 2007 Keeneland September yearling sale