Boxing legend James Toney is calling out Shannon Briggs -- claiming he should stop chasing Wladimir Klitschko around the world ... and fight him instead!!


The 3-time world champ was out in L.A. Friday and told us ... Briggs is wasting his time trying to lock up a fight with Wlad -- because Klitschko would beat his ass anyway.




We'll see if Shannon takes Toney up on his offer ... just as soon as he gets back from Germany.