Gil Clancy, the Hall of Fame boxing manager and trainer who guided Emile Griffith to the welterweight and middleweight championships and later worked as a boxing matchmaker and TV analyst, died Thursday in Lynbrook, N.Y. He was 88.

Clancy, who had lived in Malverne, N.Y., died at an assisted living facility, his daughter Patricia Houlahan said.

Clancy trained a host of big-name boxers, including George Foreman, Oscar De La Hoya, Jerry Quarry and Gerry Cooney. But he was best known for his long association with Griffith.

Clancy was teaching in the New York City schools and training amateur fighters when he developed Griffith into a Golden Gloves champion. He was Griffith’s trainer and co-manager when Griffith turned pro in 1958.