Zeferjahn deal off to a bad start

This Ryan Zeferjahn trade really hasn't aged well for the Chicago Cubs thus far. He gave up the walk-off single to Leo Rivas on Friday night and in seven appearances with the Cubs now has a 7.50 ERA with a WHIP at 2.17.

Moises Ballesteros hasn't been very good with the Los Angeles Angels either, but there's obviously some future potential there for what could turn into a really productive bat.

Mason McGwire is an intriguing young arm with a 3.82 ERA over 66 innings this season. He's recently been in High A with the Angels organization. But even if neither prospect turns out to be anything, the Cubs took a swing to make an addition to the bullpen, and Zeferjahn has been a detriment thus far.