CLEVELAND — Browns starting quarterback Josh McCown is done for the season after breaking his collarbone in Monday night’s last-second loss to the Baltimore Ravens.

McCown kept playing despite taking a big hit in the second half, but had to leave the field after throwing an incompletion in the fourth quarter.

Head coach Mike Pettine said McCown will not need surgery but described his injury as “the worst possible scenario.”

McCown has played with several injuries during his first season with the Browns, who signed him to a three-year deal in February. He sustained a concussion while diving toward the end zone on Cleveland’s first drive this season. The 36-year-old missed two more games with injured ribs.

Pettine is not ready to announce who will replace McCown. Austin Davis came in for McCown and threw a game-tying touchdown pass. Pettine also could go back to Johnny Manziel, who recently was demoted to third string.

Thumbnail photo via Ken Blaze/USA TODAY Sports Images

Thumbnail photo via Cleveland Browns quarterback Josh McCown after suffering a broken collarbone.