No doubt AJ is a huge bust. If I were a Yankees fan I would not want him on the mound in a playoff game (or in any game for that matter). Back in '09 he had a chance to clinch it in the ALCS and the World Series and was far from coming through.
Lucky for them they had Pettitte behind him to pick up the pieces. They don't have Pettitte this year.
On the flip side, Lackey was able to beat CC in Fenway this past month, and gave him another run for his money in game 1 of the most recent series. Is he who we hoped we were getting? Nope. But he's certainly fit for a playoff game. I'd take Lackey on the mound against the #3 of the Yanks, Rangers, or Tigers + the Sox offense any day.