| Fight Name: | Muhammad Ali vs. Ron Lyle |
| Fight Date: | May 16, 1975 |
| Location: | Las Vegas Convention Centre, Las Vegas, Nevada |
| Titles: | WBA, WBC and The Ring undisputed heavyweight championship |
| Fighter1: |  Muhammad Ali |
| Nickname1: | "The Greatest" |
| Hometown1: | Louisville, Kentucky |
| Record1: | 46–2 (33 KO) |
| Height1: | 6 ft 3 in |
| Weight1: | 224+1/2 lb |
| Style1: | Orthodox |
| Recognition1: | WBA, WBC and The Ring undisputed Heavyweight Champion |
| Fighter2: | Ron Lyle |
| Hometown2: | Dayton, Ohio |
| Record2: | 30–2–1 (21 KO) |
| Height2: | 6 ft 3+1/2 in |
| Weight2: | 219 lb |
| Style2: | Orthodox |
| Recognition2: | WBA/WBC No. 3 Ranked Heavyweight |
| Result: | Ali won via 11th round TKO (1:08) |
Muhammad Ali vs. Ron Lyle was a professional boxing match contested on May 16, 1975, for the undisputed heavyweight championship.
Lyle had offered the opportunity to compete for the title despite his loss to the then little-known Jimmy Young two months earlier at Honolulu, Hawaii.
This bout was aired live primetime in the United States via ABC with Howard Cosell doing the play-by-play and it took place in Las Vegas, Nevada.
Ali entered the bout at 224.5 pounds, the heaviest he had ever been at that point in his career. Lyle, at 219 pounds, was also at the heaviest weight of his career.
Ali had forecast that the bout would be a "treat for the people", but in many of the rounds he preferred to defend and absorb Lyle's sharp punches. The challenger had been exhorted by a chant of "Lyle, Lyle" from several Denver followers, and in the opening round he bloodied Ali's nose, although the bleeding abated.
Ali was jarred sporadically by Lyle's punches, usually the right hand. In the fifth, the champion chose to dance, taunting Lyle with jabs but often being pinned against the ropes. In the sixth, he displayed the "Ali Shuffle", to the delight of the crowd, and to the temporary confusion of the stiff-moving challenger.
As the ring girl from the Tropicana Hotel in Las Vegas strutted past Ali with a big card signaling the start of the eighth round, Ali stared, aware that this was the round in which he had predicted he would knock Lyle out. From his flatfooted stance, he tried for the knockout, but Lyle cornered and fought him off, particularly with a jarring right hand.
For the next two rounds, Ali rested, boxing defensively and retreating to the ropes while accepting Lyle's punches. But in the fateful 11th when he connected with the right hand. Ali suddenly pounced and finished Lyle (Ali was behind on 2 of the 3 scorecards heading into this round as Judge Bill Kipp had Lyle ahead 49–43 on a 5-point must system, while Art Lurie had Lyle ahead 46–45, and Bill Mangiaracina had it 46–46), making the scorecards of the three judges academic and making Lyle's TV home appearance an unartistic success. The end came with 1:08 of the round, after a straight right hand drove the 33-year old ex-convict across the ring and left him defenseless against the champion's onslaught. Referee Ferd Hernandez stopped the bout giving Ali a 11th round technical knockout.[1] [2] [3] [4] Lyle protested briefly, then staggered to his corner in a daze.
Lyle's corner was not happy with the referee's decision to stop the bout.[5] [6]
Confirmed bouts:[7]
| Winner | Loser | Weight division/title belt(s) disputed | Result | |
|---|---|---|---|---|
 Víctor Galíndez | Ray Elson | Light Heavyweight (12 rounds) | 8th round TKO. | |
| Larry Holmes | Ernie Smith | Heavyweight (8 rounds) | 3rd round RTD. | |
| Fred Houpe | John L Johnson | Heavyweight (4 rounds) | 4th round TKO. |
| align=center | Country | align=center | Broadcaster |
|---|---|---|---|
| KBS 9 | |||
| BBC[8] | |||
| ABC |