The teams of the NFC South began the 2019 season with a quarterback lineup featuring four household names.

With Drew Brees, Matt Ryan, Cam Newton and Jameis Winston under center for their teams, the Saints, Falcons, Panthers and Buccaneers, respectively, had an unusual level of quarterback continuity.

Just a few short years later, each of those teams will enter the 2022 season with different starters at quarterback. And they’re hardly alone.

If you want to get a sense of the breakneck pace of quarterback turnover around the NFL, a quick glance at the rampant change in starters from 2019 to the present day vividly demonstrates how quickly things change at football’s most important position.

We compiled a simple list of 2019 starting quarterbacks and contrasted it against projected starters for 2022. The difference was striking.

• At least 22 of the NFL’s 32 teams are expected to have a different starting quarterback in 2022 than in 2019.

• About a quarter of 2022 projected starters were starting for a different team in 2019.

• Only 10 of the new starters are players drafted since 2019. The others are veterans acquired from elsewhere.

• Seven of the 10 teams with holdovers from 2019 reached the playoffs last season. That might suggest something about consistency at quarterback and the types of quarterbacks who achieve longevity.

But more than anything, here’s what this bit of research proves: Quarterback upheaval is an undeniable reality of life in today’s NFL. And if recent events are any indication, this trend is going to continue. The current offseason, marked by the trades of Pro Bowl quarterbacks Russell Wilson, Deshaun Watson and Matt Ryan, suggests this level of turnover could be here to stay. This offseason was a continuation of other recent offseasons. Between 2020 and 2021, Tom Brady, Philip Rivers, Matthew Stafford and Carson Wentz changed teams.