Tony Bin (1983–2000) was an Irish-bred Thoroughbred racehorse who competed in Europe for his Italian owner from a base in Milan and became a leading sire in Japan.
O'Callaghan sold him for 3,000 guineas to the Allevamento White Star breeding and racing operation of Italian businessman Luciano Gaucci.
Sent to race in France and England, he ran second in the 1988 Grand Prix de Saint-Cloud and third to Mtoto in the 1988 King George VI and Queen Elizabeth Stakes.
At the end of the 1988 season, Tony Bin was officially rated the equal of Mtoto as the best older male horse in Europe, one pound behind the filly Miesque.
The leading sire in Japan in 1994, Tony Bin produced progeny that includes: Tony Bin sired other Grade I millionaire winners and was also the damsire of the Japanese colt Heart's Cry, winner of the 2006 Dubai Sheema Classic, who handed Deep Impact his first-ever loss in winning the 2005 Arima Kinen.