The Steelers are currently sitting pretty at the top of the AFC North with Aaron Rodgers under center -- a feat some didn't believe the 41-year-old quarterback could pull off ... but Jerome Bettis tells TMZ Sports he never doubted the player, only the body.
We caught up with the Pittsburgh legend this week at LAX ... and chopped it up about his former team lookin' pretty damn good so far this season, thanks to Rodgers' 17 touchdown passes.
Given Rodgers' underwhelming stint with the Jets last season, his resurgence has shocked plenty of fans .