After teammate Jeff Green and Brooks pushed Wall and Wizards teammates to raise the level of intensity in a practice last week, Wall fired back with "F--- you" toward Brooks, league sources said.
Wall apologized to Brooks shortly afterward and to his teammates the next day, league sources said.
The disconnect between Wall and his teammates has increased throughout the Wizards' struggles, league sources said. Washington is 5-11 and underachieving this season.
For the first time, the Wizards are willing to start listening to trade offers on their All-Star backcourt of Wall and Bradley Beal, ESPN reported on Monday.