2. Gilbert Arenas vs. Javaris Crittenton
This feud comes from their days in Washington. First of all, their rivalry intensified because of a high-stakes card came on a flight back from Phoenix. However, nobody could have expected it to escalate the way it did. Two days later, Crittenton brought a gun to practice and pointed it at Arenas.

The latter had threatened Crittenton with gun violence but nobody expected this kind of reaction. The NBA suspended both players for the rest of the season following the incident, while the Wizards released Crittenton, who hadn’t played a minute for them before this. Definitely not the best signing they’d ever made.