DON'T YOU EVER TALK ABOUT RICHARD SHERMAN'S ANKLE ... 'cause less than one week after injuring it in the Super Bowl, the Seahawks star was partying hard on it during a rager in Vegas!!!
Sherman -- along with fellow Legion of Boomer Kam Chancellor -- hit up the Chateau nightclub in Sin City Saturday night ... and cut loose, despite suffering a high ankle sprain during the Feb. 2nd victory.
Seemed like Sherman was feeling "no pain" that night -- we're guessing the gang of hot chicks following him around that night makes a man forget about a freak joint injury.
Meanwhile, Peyton Manning is still sad somewhere ..