Suggs had a full practice Wednesday before being added to the injury report a day later. This marks the first time Suggs has been on the injury report this season.
The Ravens can't afford to lose Suggs, who is fifth in the NFL with nine sacks and second on the team with 60 tackles. But durability has been a strength of Suggs. He hasn't missed a game in eight of his 10 NFL seasons.
Suggs is one of three starters on defense that missed Thursday's practice. Middle linebacker Daryl Smith (thigh) and cornerback Jimmy Smith (groin) were out for a second straight day.
The Ravens could have some issues at cornerback because backup Corey Graham (calf) didn't practice Thursday as well.
Wide receiver Marlon Brown (finger) had a full practice after being limited Wednesday, and wide receiver Brandon Stokley (groin) missed practice for a second straight day.