While approximately seven teams per offseason make a change at quarterback and there were six teams this past offseason, there could be as many as 11 teams making a change with either their current or long-term QB1 in 2018.

That assumption even excludes a surprise move such as when the Chiefs traded up to draft Patrick Mahomes at last year's draft.

There are six teams that are virtually guaranteed to have a new quarterback next year.

The 2018 draft class could have as many as five quarterbacks selected in the first round.

Kirk Cousins headlines the list of free agent quarterbacks.

The NFL has five teams ranking in the top-10 in DVOA on both Offense and Defense after Week 14. In an indication of how much turnover there's been in parts of the NFL, none of those five teams (Rams, Eagles, Vikings, Saints and Chargers) made the playoffs in 2016.

The Chiefs, Cowboys, Steelers, Falcons and Patriots also rank in the top-10 on offense, while the Jaguars, Broncos, Panthers, Ravens and Cardinals rank in the top-10 on defense.

The Seahawks, who have consistently been one of the NFL's top teams in DVOA during the Russell Wilson era, are just outside the top-10 in both categories.