Reed signed with the Ravens' practice squad Monday.
The quarterback signed after Lamar Jackson and Tyler Huntley suffered thumb and toe injuries, respectively, during Sunday's loss to the Bills. Reed spent time with the Ravens during training camp and the preseason, though he has yet to appear in an NFL regular-season game. Baltimore's third-string QB, Joe Fagnano, is also dealing with an injury, to his ankle, and was limited during Monday's walkthrough.