Myles Garrett clearly believes he'll play football again ... 'cause the dude is still hitting the weights HARD -- benching 425 POUNDS in a workout this week!!!
Of course, Garrett's NFL future is up in the air ... the Browns star is still serving out an indefinite suspension for attacking Steelers QB Mason Rudolph with his helmet in November.
But Myles apparently ain't concerned the ban will last too much longer ... he's lifting weights like he's going to be facing 300-pound O-linemen in the very near future.
Ya gotta watch the clip .