Grok says Prime Foreman beats Prime Johansson

Prime Foreman overwhelms Johansson with sheer power, size, and relentless pressure. Most see it ending in a Foreman KO mid-to-late rounds

In one poll on a boxing forum (comparing 1959 Johansson vs. 1973 Foreman), ~94% voted Foreman KO/TKO, with only a small minority for Johansson.
Key factors:
Power: Both had monster right hands. Johansson's was legendary (knocked Patterson down 7 times in one round in their first fight), but Foreman's is often considered among the most devastating in heavyweight history—his punching power was overwhelming against top competition.
Size/Strength: Foreman was significantly bigger, taller, and stronger. Johansson was around 6'1"–6'2" and 190–200 lbs; Foreman was a physical specimen who overpowered bigger men.
Style: Young Foreman was an aggressive, clubbing brawler who walked opponents down. Johansson was more mobile and counter-punch oriented than some sluggers. Some analysts argue Johansson's foot speed could help him avoid Foreman's plodding attacks and land counters.
Foreman's flaw: Early Foreman could be vulnerable if outboxed or if opponents stayed mobile and frustrated him (as Ali did with rope-a-dope later). One detailed hypothetical piece suggests Johansson's movement and big right could exploit that for an upset.

 

Yes it does. It was a big mystery until recently

 

Prime Sharkey would be a handful for a 1960-63 Ali

 

You act like Johansson wasn't a heavyweight king with a bomb of a right hand. He probably hit as hard as Ron Lyle and harder than Jimmy Young

 

Key Matchup Factors
Size and Reach — Ali has a massive edge (3–4 inches taller, longer reach). Sharkey would struggle to close distance without eating jabs.
Speed and Movement — Ali's footwork and hand speed are on another level. Sharkey was quick for his era but not comparable to Ali's "float like a butterfly" style. Ali could make Sharkey miss repeatedly, frustrating him.
Style Clash — Sharkey was aggressive and could box well, but Ali thrived against aggressors (e.g., outclassing Liston, Patterson). Sharkey's pressure might tire him chasing Ali, similar to how Tunney outboxed Dempsey with movement (and Ali was faster/better than Tunney). Some old forums speculate Sharkey could make Ali miss occasionally, but his aggression would prevent a pure spoiler win like Jimmy Young.
Power and Durability — Sharkey punched hard but not one-punch KO level against top guys. Ali absorbed huge shots (Foreman, Frazier) and rarely got stopped. Sharkey got KO'd by Louis quickly and struggled in wars.
Stamina and Heart — Both had great endurance in long fights, but Ali's was proven over 15 rounds against elite competition repeatedly.
Likely Outcome
Ali wins by unanimous decision (or late stoppage if Sharkey tires and gets caught). Ali dances, jabs, picks Sharkey apart, and uses movement to avoid Sharkey's power shots. Sharkey might win a few rounds with aggression or counters, but he lacks the tools to consistently land or control the fight. In 12–15 rounds under modern rules, Ali's superiority in speed, size, and boxing IQ dominates.
This aligns with broader consensus in boxing discussions: prime Ali handles most pre-1950s heavyweights via outboxing (similar to how he'd handle Dempsey or earlier champs). Sharkey was a great fighter (beat Carnera, fought Dempsey/Louis), but the eras' differences in training, size, and athleticism favor Ali heavily.