Boyle's career is probably done. Ricard, Oliver, and Likely can more or less do what he does and he's a zero in the pass game these days, so there's almost no difference between him on the end and Ricard. I doubt another team is going to pick up a block first TE that hasn't been able to stay on the field.
Very little doubt he's done. It's a shame he never really recovered from that injury; I'm pretty sure most of this board applauded his extension when it happened, because he was clearly a large part of the highly successful Ravens offense.