Pettitte an upgrade for Yanks

When Andy Pettitte retired after an 11-3, 3.28 season in 2010, it appeared he still had something left in his arm at the age of 38. After a year off, the 240-game-winning lefty apparently agrees, signing a 1-year, $2.5 million minor league deal with the New York Yankees.

Now the question is: How likely is it that Pettitte will successfully make a comeback? Working in Pettitte's favor was the fact that when he retired, he was still a valuable pitcher, not a hurler just hanging onto his job by the skin of his teeth. Pitchers do come back from missing years all the time, mostly due to serious injury. Surely it would be easier for a healthy pitcher to come back.