The connecting record
shownOne Punch Man · ch. 47, pp. 17-18
Garou beat Mumen Rider in One Punch Man.
Mumen Rider steps in once Tanktop Master is down, and is hospitalised.
What each of them is ranked on
The winner · Garou · rank 2
Hero Hunter
Put down the S-class hero Tanktop Master, and had Metal Bat bleeding and broken and about to be finished when the hero's sister walked in and stopped it — both while still an unenhanced human, having been thrown out of his master's dojo months earlier for hospitalising the rest of the students. After contact with "God" he copied Saitama's striking power outright, and the pair of them had to be moved off the planet before their fists met, with the released energy pushed away from Earth by four people afterwards.
shownOne Punch Man · ch. 47, pp. 11-14
Beats the S-class hero Tanktop Master after a barrage of punches.
shownOne Punch Man · ch. 58, pp. 32-40
Dodges and deflects everything the S-class hero Metal Bat throws, moving faster than Metal Bat can follow.
statedOne Punch Man · ch. 30, p. 5
Bang says he beat Garou and expelled him from the dojo after Garou disabled the other students.
All 10 citations
statedOne Punch Man · ch. 81, p. 17
Tells the heroes ambushing him that he has beaten close to a hundred of them.
shownOne Punch Man · ch. 77, pp. 17-20
Watchdog Man beats him and drives him out of Q-City.
shownOne Punch Man · ch. 169, pp. 53-55
Takes on Cosmic Fear Mode after contact with "God".
shownOne Punch Man · ch. 173
Withstands repeated Serious Punches and keeps fighting until Saitama's output outgrows him.
shownOne Punch Man · ch. 172, pp. 3-10
His Serious Punch collides with Saitama's, and Blast and three others divert the released energy away from Earth.
statedOne Punch Man · ch. 171
Blast warns him that in this state anything he does could end life on Earth, and he is unbothered.
statedOne Punch Man · webcomic ch. 55, p. 1
The webcomic also rates him a Dragon-level threat.
Beaten · Mumen Rider · rank 14
Satoru
Has held the top of C-class for more than half a year without taking the promotion he is eligible for, and said mid-fight that he is too weak to be a B-class hero, which is the register being told the truth by somebody inside it and left holding a number that fits. Why he never moved up is not something the story says. Rode at the Deep Sea King after it had gone through everyone in front of him, and got back up twice.
statedOne Punch Man · ch. 27, p. 20
Says mid-fight that he is too weak to be a B-class hero, and does not back down.
statedOne Punch Man · ch. 23, p. 16
Has kept the top position in C-class for more than half a year.
statedOne Punch Man · ch. 27, pp. 22-25
Tells the Deep Sea King that whether or not he stands a chance is beside the point.
All 7 citations
shownOne Punch Man · ch. 27, pp. 13-21
Attacks the Deep Sea King alone after Genos has been beaten, and is thrown around and swatted away.
shownOne Punch Man · ch. 27, pp. 22-25
Gets back on his feet after being thrown aside and attacks again.
shownOne Punch Man · ch. 29, pp. 16-18
Buys Saitama a drink at an oden shop to mark Saitama's promotion to B-class.
shownOne Punch Man · ch. 70, pp. 43-44
Fights monsters invading the hospital while still injured from Garou.
What this does not settle
One fight in one work. It is the only result the record gives between these two, and it is evidence about that meeting and nothing wider — not a general matchup, not a rematch, and not a ranking of its own.
The ladder above it is argued from everything either of them has been shown doing; this page is argued from one citation.
Where the two disagree, the disagreement is the point, and it stays visible rather than being resolved by whichever of them happens to be on this page.