Seattle Seahawks star Richard Sherman got verbally blasted by a mob of Denver Broncos fans in NYC -- but the guy accused of being a thug ... kept his cool. Did everyone have Sherman wrong? Plus, LeBron James and the Miami Heat hammed it up doing Karaoke -- and they were actually ... pretty awful ... but definitely playful. Does the video make you like 'em more. And we're upgrading our newsroom staff -- T.I. is joining us here in the TMZ newsroom with his take on the biggest sports stories of the day!