García is a non-roster invitee at the Yankees camp and is in the mix for the last spot in their rotation. He's 35 and kind of fat, and did virtually nothing between 2007 and 2009, while he had shoulder surgery.
But he also made 28 starts and pitched 157 innings for the White Sox last year, for a 4.64 ERA and a 94 ERA+. He had a WHIP of 1.37, and a SO/BB rate of 1.98.
That is not exceptional, but it is not bad and will get you the #4 spot in most rotations. It's also better than anyone in last year's rotation except Zack.
If I were Dayton, I would have signed him to a half-million dollar guaranteed contract with a team option for 2012 for, say, $2.5 million, in case he has a good year in 2011. That seems low-risk and a good chance for moderate benefit. He no longer has high pay expectations because he signed for $1 million in 2010.