In his flashback, we've seen 5 figures
Roger
Rocks
Shanks
Oden
Whitebeard
out of the five, two are confirmed to never defeat Kaido and those are Oden and Shanks.
Oden left a scar that can't be considered a defeat, and Shanks stopped him.
One possibility is Roger in the rock valley,
WB might have defeated him in the past when he tried to contest him, and Rocks is debatable, idk see Kaido ever trying to put up a fight against his leader.
Other possible candidates who might have defeated him
Mihawk
Garp/Sengoku
other top tier marines or Pirates
what do you guys think?
Roger
Rocks
Shanks
Oden
Whitebeard
out of the five, two are confirmed to never defeat Kaido and those are Oden and Shanks.
Oden left a scar that can't be considered a defeat, and Shanks stopped him.
One possibility is Roger in the rock valley,
WB might have defeated him in the past when he tried to contest him, and Rocks is debatable, idk see Kaido ever trying to put up a fight against his leader.
Other possible candidates who might have defeated him
Mihawk
Garp/Sengoku
other top tier marines or Pirates
what do you guys think?