I have not officially seen that this is a waiver claim, but the Giants DFA'ed Clayton Tanner a few days ago, and he is now showing up on the Bats roster, so it seems likely. He is a 23 year old starter with a 4.30 ERA in AA this season. Seems like he is still a semi-prospect.
Edit: NOT a claim, he was released and signed. How can I change the title?