Rocky Marciano (September 1 1923 – August 31 1969), born Rocco Francis Marchegiano, was the heavyweight champion of the world from 1952 to 1956. Marciano, with forty-three knockouts to his credit (an 88% knockout rate), remains the only heavyweight champion in boxing history to retire without a defeat or a draw in his professional career.
- What could be better than walking down any street in any city and knowing you're the heavyweight champion of the world?
- That was a f*ck*ng dumb question. If I didn't think I was gonna win, why the hell would I be fighting?
- Why waltz with a guy for 10 rounds if you can knock him out in one?
- I don't want to be remembered as a beaten champion.
- Roland La Starza was tough, but Ezzard Charles was the toughest man I ever fought. I learned what pain was all about when I fought him.
- I believe, in my prime, I could have fought with anybody alive.
- Quoted on rockymarciano.net 
- I have always adhered to two principles. The first one is to train hard and get in the best possible physical condition. The second is to forget all about the other fellow until you face him in the ring and the bell sounds for the fight.
About Rocky Marciano
- Rocky Marciano stood out in boxing like a rose in a garbage dump.
- The greatness of Marciano in the ring was defined by the way he prepared for a fight, his ability to punch and take a punch.
- I got a guy who's short, stoop shouldered, and balding with two left feet. They all look better than he does as far as the moves are concerned, but they don't look so good on the canvas. God, how he can punch.
- Charlie Goldman, Marciano's trainer 
- Rocky is a poor Italian boy from a poor Italian family, and he appreciates the buck more than almost anybody. He's only got two halfway decent purses so far, and it was like a tiger tasting blood
- Rocky is not in there to outpoint anybody with an exhibition of boxing skill. He is a primitive fighter who stalks his prey until he can belt him with that frightening right-hand crusher. He is one of the easiest fighters in the ring to hit. You can, as with an enraged grizzly bear, slow him down and make him shake his head if you hit him hard enough to wound him, but you can't make him back up. Slowly, relentlessly, ruthlessly, he moves in on you. Sooner or later, he clubs you down.
- Ed Fitzgerald, one of the premier sportswriters of the Marciano era. 
- I was on my face. I heard the count from one to 10. I kept telling myself that I had to get up, but I couldn't move. I couldn't make myself move. It was the strangest feeling.
- Rocky didn't know enough boxing to know what a feint was. He never tried to outguess you. He just kept trying to knock your brains out. If he missed you with one punch, he just threw another. I had the braggadocio and the skill and the guts, but that wasn't enough. Marciano beat me down.