Table:
text: List of boxing quadruple champions
List of Boxing Quadruple or Four Division Champions — Major Titles
List of Boxing Quadruple or Four Division Champions — Major Titles
Number_ Name_ Titles Date_ Opponent Result_ Defenses
3 Roberto Durán WBC Welterweight (147) 1980-06-20 Ray Charles Leonard UD 15/15 0
3 Roberto Durán The Ring Welterweight (147) 1980-06-20 Ray Charles Leonard UD 15/15 0
3 Roberto Durán WBA Light middleweight (154) 1983-06-16 Davey Moore TKO 8/15 0
3 Roberto Durán WBC Middleweight (160) 1989-02-24 Iran Barkley SD 12/12 0
4 Pernell Whitaker IBF Lightweight (135) 1989-02-18 Greg Haugen UD 12/12 8
4 Pernell Whitaker The Ring Lightweight (135) 1990-08-11 Juan Nazario KO 1/12 3
4 Pernell Whitaker IBF Junior Welterweight (140) 1992-07-18 Rafael Pineda UD 12/12 0
4 Pernell Whitaker WBC Welterweight (147) 1993-03-06 James McGirt UD 12/12 8

Question: How many times has Iran Barkley been an opponent on the list of four-time boxing champions?