Dallas Cowboys star cornerback Trevon Diggs is fed up with watching Stefon lose in Buffalo ... publicly pleading to get his brother off the Bills ASAP.
Trevon -- who's sidelined for the rest of the season with an ACL injury -- was live tweeting as he watched the Bills' 24-22 loss to the Denver Broncos on Monday Night Football ... and after the game, he fired off his opinion on his brother's situation.
"Man 14 Gotta get up outta there ud83dude2bud83dude2d," Trevon said following Stefon's three-catch, 34-yard performance.