https://profootballtalk.nbcsports.co...out-4-6-weeks/

The Ravens will be without at least one of their key offensive players for Sunday’s game against the Browns — and that player will be sidelined for several weeks.

Shortly after Baltimore ruled out running back J.K. Dobbins with a knee injury, ESPN’s Adam Schefter reported Dobbins is expected to undergo arthroscopic knee surgery and will be sidelined for the next four-to-six weeks.

He's going to be a huge loss!