Authorized's third run of 2007 came in the Eclipse Stakes at Sandown Park on 7 July, where attempted to become the first Epsom Derby winner to win the Eclipse since Nashwan in 1989, and the first Epsom Derby winner to win another race of any description since High Chaparral in 2002. He was provided with a pacemaker, Champery, to give him a strong pace in an effort to test the stamina of his closest expected rival, George Washington, but despite beating George Washington he finished second to Notnowcato, who was switched to the stands side of the course by Ryan Moore to exploit the faster ground there.