Jackson wasn't spotted at Thursday's practice, Jonas Shaffer of The Baltimore Sun reports.
Jackson wasn't listed on Wednesday's injury report, but it's possible that the quarterback's absence Thursday is maintenance-related. With that in mind, Shaffer notes that Jackson emerged from Baltimore's Week 2 win over Kansas City with some hip soreness following a flip into the end zone. Thursday's injury report will reveal whether Jackson was rested or is given an injury designation.