Monarchos' victory in the May 5 Kentucky Derby (gr. I) will provide the Grayson-Jockey Club Research Foundation with a donation of $8,120 from owners John and Debby Oxley, and another $8,120 from the syndicate that owns the colt's sire, Maria's Mon.On April 3, Oxley pledged to donate 1% of the colt's earnings from victories in grade I races up to and including the Kentucky Derby. He made the pledge retroactive to the colt's victory in the Florida Derby (gr. I).The syndicate that owns Maria's Mon then pledged to make a donation equal to 1% of the colt's earnings in those races.The Florida Derby victory by Monarchos was worth $12,000 to the Grayson-Jockey Club Foundation. The winner's share of the purse in the Gulfstream Park race was $600,000.