Ex-NBA star Joe Johnson says Kevin Durant, James Harden and Kyrie Irving are already the most lethal scoring big 3 in NBA history ... telling TMZ Sports the Brooklyn Nets will be a serious problem for "any damn body."
It's a huge statement coming from Johnson -- after all, the Golden State Warriors won 2 'ships with the offensive juggernaut of KD, Steph Curry and Klay Thompson ... and very well could have won more if everyone had stayed healthy.