Robert Griffin III entered in place of Jackson during the third quarter against the Falcons.
Jackson was seen jogging to the locker room alongside a few trainers.
Robert Griffin III replaced Jackson under center for the Ravens.
Jackson, who Baltimore selected with the 32nd pick of the 2018 NFL draft, made his third straight start on Sunday in place of quarterback Joe Flacco, who's been nursing a hip injury.
You can follow Sunday's game live here.