Too bad the WBC title fight's not today ... 'cause Devin Haney and Regis Prograis seemed ready to beat the hell of out each other after a heated argument at a press conference days before their boxing match.
The expletive-filled incident happened on Thursday during the Haney vs. Prograis final press conference ahead of their Dec. 9th fight which is going down in San Francisco.
Things got heated after Haney's team said Devin would knock Regis out ... something Prograis questioned, highlighting Devin's knocklout rate.