His best known punch was a powerful left hook , which accounted for most of his knockouts .
Frazier 's style was often compared to that of Henry Armstrong and occasionally Rocky Marciano , dependent on bobbing , weaving and relentless pressure to wear down his opponents .
Frazier 's best known punch was a powerful left hook , which accounted for most of his knockouts .
Frazier 's style was often compared to that of Henry Armstrong and occasionally Rocky Marciano , dependent on bobbing , weaving and relentless pressure to wear down his opponents .