Andy has been an effective pitcher for the Yankees since his return to the team in 2007. In fact, he was working on one of his best seasons yet before succumbing to injury in July of this year.
For Andy, it's all about the cutter. The success of every outing is almost entirely determined by how well he's throwing his cut fastball, and he's been very proficient at locating the pitch. This is one of the big reasons he's done so well late in his career.
In 2010, Andy's cutter ranked in the 95th percentile in opponents' AVG, SLG and wOBA, as well as Contact%. One more year of that, or something close to it, would help the Yankees' rotation considerably, and may even be necessary if Lee signs elsewhere.