Ex-NFL Superstar Larry Johnson -- I'm a STRIP CLUB DJ Now!

Ex-Kansas City Chiefs superstar running back Larry Johnson no longer plays football ... but he DOES play strip clubs ... as a guest DJ ... TMZ has learned.

Multiple TMZ strip club sources ... yeah, we got those (a lot of those) ... tell us Johnson has been spotted manning the DJ booth at Tootsie's Cabaret in Miami several times this year.

We're told Johnson isn't the main DJ -- but every now and then, he'll take over the booth for a quick guest set ... and the crowd loves it.

For the record, Tootsie's is HUGE with pro athletes ... like Aaron Hernandez who allegedly shot his friend in the face after patronizing the club back in February. Good times ...

We called the Cabaret for comment on the DJ situation -- but unlike their dancers, management was tight-lipped.