Veteran sprinter The Tatling will be retired after an extraordinary career after running in his 176th race at Wolverhampton on Monday.
Trainer Milton Bradley is calling time on the career of the 14-year-old, who has won 17 races including the King's Stand Stakes. He was also second in the G1 Nunthorpe Stakes three times.
"He has got a little bit steadier and it is unfair to run him after he has been such a good servant to us," the trainer said.
"He has just lost a bit of his sparkle."
Bradley has had The Tatling[ since claiming him in 2002.
He nominated The Tatling's 2004 victory in the King's Stand - then a Group 2 - as the highlight.
He said: "It was a big field and they didn't give us a lot of chance, two furlongs out he had three behind him but he won going away, it was no lucky win."