Graves will get saves. He will not help your WHIP. He normally puts guys on and then gets out of the jam he created. Thankfully, with the number of innings a closer pitches, his bad WHIP won't hurt your team's WHIP very much. I would guess about 20 saves through July, when he would probably be traded to be a setup man for a contender. As stated above, he has extra value because he will get you saves from an SP slot.