For all of those who are going to reply "Lesters not ready yet"...
When do we actually know when a guy is ready for the bigs? Only way to find out is to give him an oppurtunity to prove himself. More and more teams are bringing up their young guys under 23 and alot of them have been successful. Think about all the good young pitchers in the game. This many more today than their used to be. That being said, most of the young guys pitching right now, weren't considered to be as good as a prospect as Lester is.
http://baseballanalysts.com/archives/2006/01/2006_wtny_75_25.php
Lester is 14th on the list and Verlander, whos having a great season for DET is 13th.
He should be given an oppurtunity this year and if he sucks, send him back down to AAA.