Jack Swagger is fighting a factory worker who weighed 330 pounds 3 months ago ... and that regular dude, well ... he says he's gonna knock Swagger's ass out cold.
The former college wrestling and WWE Superstar -- government name Jake Hager -- has his 2nd pro MMA fight Saturday at Bellator 221. Swagger DOMINATED his first opponent ... submitting him in the 1st round.
Enter 6'2", 265 lb. T.J. Jones -- who holds down a 9 to 5 job at a meat factory in Kansas (yes, seriously) -- and basically has no experience as a fighter (he's 1-1).