For those who aren’t familiar with DVOA, here is the quick version of what it is. DVOA is Defense-adjusted Value Over Average. This number represents value, per play, over an average quarterback in the same game situations. The more positive the DVOA rating, the better the player’s performance. Negative DVOA represents below-average offense. This stat not only adjusts for era, but also for the strength or weaknesses of the defenses that a given quarterback faced.
So in 2019 the range of DVOA values for quarterbacks was from 39.8% (Drew Brees) to -73.8% (Colt McCoy).