The Ravens can (and have) lined up their TE2 and TE3 in the backfield, making them blocking fullbacks in everything but name. Today im pretty sure they even lined up Andrews in the backfield..Have a feeling Pat is gone too though FBs arent used much around the league so we will see. Have to think the Ravens want him back.
Given how good the Ravens usually are in short yardage (when Lamar is healthy and their line isn't made up of spare parts) I really don't think they need a FB that can be a ball carrier. Ricard doesn't even get carries - he's had 3 carries in the past 2 years. So if you had to pick between a blocking pass catcher versus a blocking runner, I think you go for the pass catcher most of the time.
Kyle Juszczyk exists, sure, but he's basically a short TE with a FB label.