Jones said he had an irregular heartbeat and is doing better now. He's been practicing all week on a limited basis.
Running back Bernard Pierce is also listed as questionable with a thigh injury, but is expected to play.
Offensive tackle Michael Oher practiced all week and is listed as probable. He said he was confident in his sprained right ankle.
"I had a good week, feeling really good," Oher said. "I hope I'm feeling good Sunday as well. I've been getting a ton of treatment and basically going. The team needs me and I want to be out there, anyway."
Oher hasn't missed a start in his NFL career, a durability streak of 65 consecutive games.
"The motivation is just we want to win games," Oher said. "I work extremely hard in the offseason and at practice every day trying to be there for the team, trying to make sure that I'm helping everybody out. It definitely helps that we played on a Thursday. I had an extra four or five days rest, that helps tremendously."
The Ravens already ruled out Pro Bowl kick returner Jacoby Jones, who's out four to six weeks with a sprained medial collateral ligament in his right knee, suffered when rookie safety Brynden Trawick accidentally ran into him while he was signaling for a fair catch.
None have practiced this week and could just as easily be listed as out.
Rookie outside linebacker Barkevious Mingo (bruised lung) is probable. The first-round draft pick from LSU has been cleared medically and is set to play, according to coach Rob Chudzinski.
Cornerback Buster Skrine (shoulder) is also probable.