Brown dropped an interception along the sideline and kicked the ball nearly 30 yards downfield in frustration. Harbaugh screamed at Brown to leave the field, and Brown ran to the locker room.
"Are we going to be a disciplined defense or a [expletive] outfit," Harbaugh yelled over to the sideline, where all the defensive players stood. "Dean [Pees, defensive coordinator], that's on you."
This riled up the defensive players, especially linebacker Terrell Suggs. The defense went on to dominate the rest of the drill.
"Coach, we got your back," Suggs told Pees. "We can take it and we can dish it out."
Suggs continued to talk back loudly, and Harbaugh called the linebacker for a quick chat on the field. Brown was asked to return after being inside for about five minutes, and he explained his actions to the coach before returning to practice.
This was just the second issue between Harbaugh and his defensive staff on Saturday. Earlier in practice, Harbaugh asked an official to throw a flag for the defensive coaches being out on the field of play.