Joe Flacco is listed as doubtful after missing practice all week with a hip injury but it's possible he could still play. Baltimore coach John Harbaugh, who has declined to publicly name a starter, could also go with rookie Lamar Jackson or Robert Griffin III, who received substantial work with the first-team offense Thursday as Jackson missed practice with a stomach ailment.
The 28-year-old Griffin has played 42 games in his NFL career with the Washington Redskins and Cleveland Browns, passing for 8,983 yards and 42 touchdowns with 26 interceptions. He has not been active for a game this season.
Jackson, the 2016 Heisman Trophy winner and the Ravens' first-round pick (No. 32 overall) out of Louisville, has played in every game this season at several positions. He completed 7 of 12 passes for 87 yards and a touchdown, in addition to rushing 28 times for 139 yards and another score.
The Ravens (4-5), who got off to a 3-1 start, trail first-place Pittsburgh (6-2-1) and Cincinnati (5-4) in the AFC North.