The Jets were in the middle of the red-zone period of Thursday's joint practice with the Green Bay Packers when Lawson went down with a seemingly serious leg injury.
The practice field immediately went silent as Lawson was surrounded by his teammates and coaches before being taken off the field on a cart.
NFL Network's Ian Rapoport is reporting that Lawson suffered a lower-leg injury and is having an MRI on his Achilles. If it were to be torn, Lawson would miss the 2021 season and perhaps even more time.
Losing Carl Lawson would be devastating for the NY Jets
Lawson was the Jets' biggest free-agent addition of the offseason as the team signed the former Cincinnati Bengals pass rusher to a three-year, $45 million contract.
Fresh off a career year in which he finished fourth among all edge rushers with 64 pressures, Lawson was eyeing a monster 2021 season.
The 26-year-old has been the most dominant player in training camp this summer regularly beating Mekhi Becton and anyone he has matched up against.
Lawson seemed primed to excel as part of a talented defensive line under new head coach Robert Saleh. That's why losing him for any significant period of time would prove disastrous for Gang Green.
It's worth noting that Lawson has already torn his ACL twice in his career. The first came during his sophomore year of college and then again in 2018. Each was a different leg.
The nature of his current injury is unknown, but it did seem to be serious.
We will continue to update this story as more news becomes available.