Stan Van Gundy is going scorched earth on The Worldwide Leader ... after the network unceremoniously dumped his little brother Jeff Van Gundy after nearly two decades with ESPN, and he's PISSED!
Jeff -- an NBA head coach for 11 seasons (Knicks, Rockets) -- worked for ESPN for 17 years until he was laid off last summer.
JVG has largely been quiet about the shocking move ... but, not so much for his brother Stan, who aired out his frustrations on Dan Le Batard's South Beach Sessions show.