The Chicago Bears wants to make it clear ... they do NOT endorse Brian Urlacher's IG post, criticizing NBA players for being outraged over the shooting of Jacob Blake.
Urlacher -- a Hall of Famer who spent his entire 13-year NFL career with the Bears -- set social media on fire Thursday ... by taking a shot at the NBA boycott.
"Brett Favre played the MNF game the day his dad died, threw 4 TDs in the first half, and was a legend for playing in the face of adversity,” Urlacher's post said.