Steelers head coach Mike Tomlin has labeled Freiermuth (hamstring) as "very doubtful" for Sunday's game against the Ravens, Mike DeFabo of The Athletic reports.
The Steelers may wait until Friday to formally rule Freiermuth out, but the tight end doesn't look set to practice in any capacity this week after exiting a Week 4 loss to the Texans with a strained hamstring. Expect rookie Darnell Washington to serve as the Steelers' starting tight end in Week 5, while second-year man Connor Heyward should also see increased reps.