Kris Kristofferson's Son -- Busting Heads at WWE Boot Camp

Kris Kristofferson's 6'2", 230-pound BEAST of a son has finally begun his career as a WWE superstar ... and TMZ has obtained pics of the 24-year-old in action on his first day of training camp.

"Big Country" Jody Kristofferson locked horns with several other up-and-coming wrestler's in the WWE's private training facility in Florida this week ... just weeks after inking a developmental contract with the organization.

Jody has been busting his ass for years in the minor league wrestling circuit ... paying his dues in small town wrestling matches ... until he recently attracted the eye of WWE scouts.

We're told officials like the fact that his father is famous ... but they feel he's not just a flash in the pan, and has real potential to be a break-out star.