Baltimore's WR problem

The Baltimore Ravens began their Super Bowl defense with some major moves this offseason, inking Joe Flacco to multi-year extension, bidding farewell to Ed Reed, Dannell Ellerbe and Paul Kruger in free agency and trading Anquan Boldin to the team they'd just beaten for the title. Of all the losses, the one that's yet to really be filled with another option is the hole at WR.