Jobless, and stats = 0, maybe because they're all immeasurable. Stats potentially broke the ceiling of the measurement standard, so they're all registering as 0 instead; it's an error reading, like "Jitsu wa Ore, Saikyou Deshita?", where MC has a magic output of 1002, but scanners can only read double-digits, so he only got a rating of 02. Because his specific tendencies can't be gauged, he's "Jobless", because his job cannot be defined. Weak at the beginning, because training with normals couldn't bring out his real potential. Just a guess. That may be how the author will spin it.