COVID-19 is making this the most unpredictable NBA season ever

Why Pierce suggests the NBA return to the bubble for playoffs (1:13)

Paul Pierce and Robert Horry want the NBA to go back to the bubble for the playoffs to avoid players missing big games. (1:13)

The theme of the young 2020-21 NBA season is unpredictability.

Through the first three weeks of action, an NBA campaign being played during the midst of the COVID-19 pandemic has been marked by upsets, inconsistency and lopsided scores. With more teams forced to play without key players due to the league's health and safety protocols, that doesn't figure to change anytime soon.

Just how difficult has the 2020-21 season been to predict so far? What helps explain the inconsistency from game to game? Let's take a look at the historic numbers.