Boxing star Zab Judah has launched his own investigation into his June 7 fight with Cletus Seldin which left Zab hospitalized with a brain bleed ... with Zab calling for drug test results.
Zab -- a 6-time world champion -- suffered numerous injuries including an intercranial hemorrhage in a TKO loss to Seldin which required emergency surgery after the fight.
Judah is doing much better now ... but he's also really pissed off and looking for answers.
In fact, the 41-year-old has hired the Eleftarakis, Eleftarakis and Panek law firm to investigate "all circumstances involving the fight.