Desmond Watson -- the 449-pound rookie -- has hit a speed bump in his NFL journey ... as the Tampa Bay Buccaneers cut him ahead of the 53-man roster deadline.
The news -- first reported by Greg Auman -- comes as the man dubbed the "tush push terminator" was looking to shed a bunch of lbs in order to hit the field.
Unfortunately for him, he never saw any preseason action during his time in Tampa.