Jake Peavy believes he has ''a lot left in the tank'' and is ready to test what's left of his surgically repaired right arm this spring. "There's no doubt that they told me 12 to 18 months out of surgery you are as good as you are going to get,'' Peavy said. ''I've done all the rehab. We've done all the work. You know, who I am is who I am, and hopefully it's a tick better and the guy we saw flashes of at times last year.'' Peavy is in the last season of a three-year, $52 million contract signed in 2010. The White Sox hold a $22-million club option for 2013 with a $4 million buyout.