24. Gilbert Arenas – Washington Wizards
Together with Javaris Crittenton, Arenas participated in one of the most ludicrous lockerroom disputes in NBA history. While Crittenton was the overall perpetrator, Arenas’ own part in this scandal can’t be discounted because it was so dumb. The pair got into it over a gambling dispute before pulling guns on each other in the locker room. The NBA, the Washington Wizards, and D.C. Law Enforcement all had something to say about this.
After the investigation concluded, the NBA suspended Arenas for most of the 2009-10 season. This was a massive blow because Arenas and Crittenton were valuable members of a genuinely decent roster. It also had a cost on dressing room morale. In the end, the Wizards ended the season with a shoddy losing record having underachieved without two of their stars. A moment of stupidity cost the franchise.