Cincinnati Bengals rookie quarterback Joe Burrow tore his ACL, MCL and suffered other structural issues in his left knee, sources told ESPN's Adam Schefter and Ben Baby.
An MRI taken Monday revealed the damage.
Burrow suffered the injury in the third quarter of Sunday's loss to Washington after he was sandwiched by two Washington defenders who converged on him on a third-and-2 pass attempt.
The first overall pick in the 2020 draft was on pace to become the first rookie in league history to have six 300-yard passing games in his first 10 appearances.