Ranking the 5 biggest teammate feuds of the last 20 seasons

Sometimes, the biggest of rivalries aren't between opponents, but amid two players from the same team.

From gambling debts to leaked videos, some of the NBA's biggest beefs have stemmed from the most bizarre reasons.

Here are the five biggest teammate feuds of the last 20 seasons:

James Harden and Dwight Howard

The rocky relationship between Harden and Howard was recently referred to as "cordially bad," and even that may be putting things lightly. The duo reportedly maneuvered to have the other traded back in 2014, creating a bitterness between the two that has never faded.

Nick Young and D'Angelo Russell

If a franchise-low in wins wasn't bad enough, the Los Angeles Lakers' 2015-16 campaign managed to get even worse after a leaked video created a late-season beef between Nick Young and D'Angelo Russell. Russell later apologized for the incident, but Young had difficulty forgiving the Lakers rookie, as he immediately left the team for an extended period of time.

Tony Allen and O.J. Mayo

A gambling debt reportedly led to one of the worst altercations between teammates of the modern era. Things quickly got heated between O.J. Mayo and Tony Allen back in 2011 after Mayo refused to pay Allen for a lost bet, causing a fight to break out on the team plane.

Shaquille O'Neal and Kobe Bryant

Three straight championships wasn't enough to prevent the bad blood between Kobe Bryant and Shaquille O'Neal from heating up. Things got so intense that the Lakers were ultimately forced to choose between the two, as Los Angeles ultimately opted to ship Shaq to South Beach during the summer of 2004.

Gilbert Arenas and Jarvaris Crittenton

By far the most extreme of them all, the friction between Arenas and Crittenton got so intense that it led to an altercation involving firearms in the Washington Wizards locker room. Unsurprisingly, Arenas and Crittenton were both handed suspensions that lasted for the remainder of the season.