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Depth matters in the NBA.

Sure, some teams can dominate with unstoppable starting fives. But the players in those lineups are still human. They'll need breaks throughout their 48-minute battles, and may even succumb to injuries that force them out of action for sustained stretches.

Winning is unnecessarily difficult without a quality bench.

In general, teams' non-starters are lesser players than those who open games on the court, and the total product coming off the pine provides below-average production. But there are exceptions, especially after a few organizations used the trade deadline to strengthen their backups.

In the interest of remaining purely objective, we're using NBA Math's total points added (TPA) to determine these rankings. By summing the two components of TPA—offensive points added and defensive points saved—for every bench player currently rostered by each team, we can determine the total amount of value every squad's backups have provided. (i.e. A score of zero indicates perfect averageness and anything higher is better.)

Because TPA accounts for volume and efficiency, the players who receive the largest share of minutes will impact the standings most. But everyone matters.