Joint practices for the New England Patriots and Carolina Panthers were marred by brawls during both Tuesday and Wednesday's sessions.
On Tuesday, several players were ejected after the two teams fought near the sideline. Wednesday's brawl was the result of Panthers safety Kenny Robinson's vicious hit on Pats wideout Kristian Wilkerson and defensive end Deatrich Wise's late hit on Panthers star running back Christian McCaffrey.
When it comes to these dust-ups, there's a fine line between competitiveness and wasting valuable practice reps.