The Ravens made their first move since Derrick Mason's retirement announcement, inviting four mid-level wide receivers for a tryout on Friday.
While all the names can't be confirmed, it is believed that D.j. Hackett will be the most recognizable receiver at the workout.
A Ravens official couldn't confirm any names or whether a workout had been scheduled.
The agents for receivers Amani Toomer and Justin Mccareins said they wouldn't be at the workout. Other free-agent receivers available include: Drew Bennett, Darrell Jackson, Robert Ferguson, Koren Robinson and Ike Hilliard.
There has been speculation that Marvin Harrison, who is considered the top free-agent receiver left, might wait until the middle of training camp before making a decision.