'The League's' Steve Rannazzisi Quit Fantasy Football, 'No More for Me'

Steve Rannazzisi -- who starred on a show about FANTASY FOOTBALL for 7 SEASONS -- says he's officially quitting fantasy football forever ... and he's being completely serious.

Of course, Steve played Kevin on "The League" -- the FXX show about a bunch of friends in an FF league together ... it guest starred a ton of real NFL players including Adrian Peterson, Antonio Gates, J.J. Watt.

But when we got Steve out in L.A. over the weekend, he explained why he's sworn off fantasy for good.