The weakest position is WR as it stands. Before we talk rookies you have Steve Smith who's snaps the Ravens talked about reducing this year in order to make sure he holds up and then a bunch of WR who showed they can be okay 3rd and 4th WR but none of them really looked like they could jump to the number 2 WR spot on the team. So even if Perriman turns out to be a little worse then Torrey, which would be a strong rookie season, you are still looking at a fairly weak position barring any late round picks and undrafted picks somehow making the transition which not impossible is not something one counts on. After that its probably TE. The TE group is Pitta who may or may not play, Gillmore who is okay but not spectacular and then 2 rookies who have never played a game which means you should never overestimate them. I think they wont be weak as blockers but its possible the Ravens will be lacking a great pass catching TE this year. Im still worried slightly about the corner position even though they did add depth there Arrington cant really play the outside and the corners all got hurt so they now are all injury prone but it is unlikely that such a perfect storm happens again but I would still rank it as the 3rd biggest area of weakness if only because the rest of the roster is filled with quality starters and quality depth.