Ever since he was a child, Saitama had always dreamed of becoming a powerful hero able to defeat even the mightiest of monsters in a single punch. Though as he got older he lost motivation knowing he had no special talents or abilities. He wasn't born with psychic powers, given robotic parts or genetically modified.
However one day when he was given the opportunity to save a child from a ferocious monster, Saitama regains his passion for becoming a hero and trains vigorously to get there. After a year and a half of nonstop dedication, he notices that his hair starts to fall off and he now has tremendous strength. Saitama continues to train for an additional year and a half. And after 3 years into his regimen, Saitama breaks his human limits and through sheer determination, he was able to achieve the power he had always dreamed about. He could now defeat any foe put in front of him in merely one punch.
This profile details Saitama's power during his time training. For Saitama's stats after he completed his training and gained the massive power he currently has throughout the series, see here.
Powers and Stats
Tier: 9-B | At least 9-B | 7-A
Origin: One Punch Man
Classification: Human, Amateur Hero
Powers and Abilities: Superhuman Physical Characteristics
Attack Potency: Wall level (Ripped out Crablante's eye socket and organs) | At least Wall level (Far stronger than before. Once he recovered from his training, he was able to easily one shot Personification Of A Light Pull Cord) | Mountain level (Casually one shot a Demon level. Performed feats powerful enough that King was considered to be the strongest man on earth when he took credit for them)
Speed: Superhuman (Able to run several feet faster than Crablante could punch someone directly in the face) | At least Superhuman (Much faster than before his training. Can casually outpace speeding cars and evade them from close range) | At least Massively Hypersonic+ (Much swifter than most Demon Level threats. His speed should be greater than if not at least somewhat comparable to most S-Class fighters.)
Lifting Strength: Unknown
Striking Strength: Wall Class | At least Wall Class (Able to easily penetrate monsters stronger than Crablante with his punches) | Mountain Class (Can kill Demon levels in one blow. King is considered to be one of the strongest S-Classes because Saitama's strength was credited to him)
Durability: Wall level (Survived a beating from Crablante and being thrown hard enough to break concrete. Should be more durable than his 12 year old self, who survived this) | At least Wall level | Mountain level
Stamina: Very high
Range: Standard Melee Range
Standard Equipment: None notable
Intelligence: Skilled hand to hand combatant and can improvise different strategies on the spot during fights, though he is below average academically.
Weaknesses: Doesn't have any formal martial arts/combat training, is lacking academically and he's unable to breath in space.
Key: Prior to Training | Post 300 days of training | Post 1 and half years of training