List of Fights

List of fight in chronological order:

Pre-Series

 * Saitama vs. Piggy Bancon (Off screen)
 * Saitama vs. Crablante
 * Saitama vs. Personification Of A Light Pull Cord
 * Saitama vs. Octopus Claw Man (Off screen)
 * Saitama vs. 170,000-Year Magicicada Nymph (Off screen)

Saitama Introduction Arc

 * Saitama vs. Vaccine Man
 * Saitama vs. Marugori
 * Saitama vs. Super Custom YO649Z Mk. II
 * Saitama vs. Subterranean King

House of Evolution Arc

 * Saitama vs. Mosquito
 * Genos vs. Mosquito Girl
 * Saitama vs. Kamakyuri, Slugerous, Frog Man, Ground Dragon and Beast King
 * Genos vs. Armored Gorilla
 * Genos vs. Carnage Kabuto
 * Saitama vs. Carnage Kabuto

Paradise Group Arc

 * Speed-o'-Sound Sonic vs. Paradise Group and Hammerhead
 * Saitama vs. Hammerhead
 * Saitama vs. Speed-o'-Sound Sonic

National Superhero Registry Arc

 * Saitama vs. Genos

Rumored Monster Arc

 * Saitama vs. Speed-o'-Sound Sonic: Round Two
 * Spring Mustache and Golden Ball vs. Kombu Infinity

Giant Meteor Arc

 * Genos, Bofoi and Saitama vs. Meteor
 * Saitama vs. Tanktop Tiger and Tanktop Black Hole

Sea Monster Arc

 * Stinger vs. Seafolk
 * Lightning Max vs. Deep Sea King
 * Puri-Puri-Prisoner vs. Deep Sea King
 * Sneck, All Back-Man, Jet Nice Guy and Bunbunman vs. Deep Sea King (Off screen)
 * Genos vs. Deep Sea King
 * Mumen Rider vs. Deep Sea King
 * Saitama vs. Deep Sea King

Alien Conquerors Arc

 * Tatsumaki vs. Ancient King
 * Iaian vs. Melzalgald
 * Atomic Samurai, Bang, Metal Bat and Puri-Puri-Prisoner vs. Melzalgald
 * Saitama vs. Groribas and Geryuganshoop
 * Saitama vs. Boros
 * Saitama vs. Pluton

King Arc

 * King vs. Tongue Stretcher
 * Genos vs. G4
 * Saitama vs. Giant Crow

Garou Introduction Arc

 * Garou vs. Blue Fire, Heavy Tank Fundoshi, Magic Trick Man and Criminals

The Blizzard Group Arc

 * Genos vs. Speed-o'-Sound Sonic
 * Saitama vs. Fubuki, Eyelashes and Mountain Ape
 * Saitama vs. Speed-o'-Sound Sonic: Round Three
 * Sweet Mask vs. Suppon

Hero Hunt Arc

 * Garou vs. Mumen Rider, Tank Topper Army and Charanko
 * Garou vs. Red Nose, Studless and Hyottoko (Off screen)
 * Garou vs. Golden Ball and Spring Mustache
 * Garou vs. Saitama
 * Metal Bat vs. Junior Centipede and Human Bird Grass (Off screen)

Monster Raid Arc

 * Metal Bat vs. Senior Centipede and Rafflesidon
 * Metal Bat vs. Elder Centipede
 * Garou vs. Metal Bat
 * Bofoi vs. Elder Centipede
 * Pineapple and Mohican vs. Rhino Wrestler
 * Heavy Kong vs. Marshall Gorilla
 * Lightning Genji vs. Electric Catfish Man and Maiko Plasma
 * Bang vs. Fist Fight Djinn
 * Lightning Max vs. Lin Lin
 * Fubuki vs. Do-S
 * Death Gatling, Butterfly DX and Bone Bone vs. Hundred-Eyes Octopus
 * Saitama vs. Zakos
 * Lightning Max vs. Suiryu
 * Sneck vs. Benpatsu
 * Volten vs. Bazuzu
 * Gatlin vs. Hamukichi
 * Dave vs. Rosie
 * Choze vs. Mentai
 * Sour Face vs. Jakumen
 * Genos vs. Face Ripper
 * Genos vs. Awakened Cockroach
 * Saitama vs. Bakuzan

Monster Association Arc
The following section contains Webcomic spoilers. You have been warned manga-only readers.
 * Sneck vs. Suiryu
 * Volten vs. Gatlin
 * Choze vs. Dave
 * Saitama vs. Sour Face
 * Drive Knight vs. Monsters
 * Child Emperor and Pig God vs. Eyesight
 * Garou vs. Watchdog Man
 * Flashy Flash vs. Hundred-Eyes Octopus
 * Atomic Samurai vs. Haragiri
 * Suiryu vs. Volten
 * Saitama vs. Choze
 * Saitama vs. Suiryu
 * Suiryu vs. Choze, Benpatsu, Volten, Hamukichi, and Gouketsu