Head coach John Harbaugh said Wednesday that Mitchell (knee) won't play Sunday against the Browns, Jonas Shaffer of the Baltimore Banner reports.
Harbaugh added that Mitchell is set to go full speed in practice Thursday, after which point the team will have a better indication of a potential timetable for the second-year running back's return from a torn ACL suffered last December. The Ravens are hoping Mitchell will come back prior to the expiration of his 21-day window to return from the PUP list, which will open when he officially starts practicing.