Since he's not a starter nor was he claimed to be one, I suspect he is attempting to force the Ravens to release their claim on him.
The best way for a non-starter player who has been claimed to do that is to refuse to show, wait until the team signs another player, then inform the team you are coming.
If the team releases the newly signed player instead of you, then you back out again and refuse to show.
Most teams are not going to go through with a headache process for a backup player in most cases so they will likely give up, release him and move on.