As SSR has pointed out, his ERA has actually been right around league average for starting pitchers. It hasn't been awful. Plus, look at his home and away ERA splits from his time with the Cubs, and his time with the Phillies: Cubs: 99 Home: 4.20, Away: 3.99 00 Home: 3.71, Away: 5.15 01 Home: 3.39, Away: 4.24 02 Home: 3.09, Away: 4.31 Phillies 05 Home: 4.38, Away: 4.05 06 Home: 5.18, Away: 4.64 07 Home: 5.26, Away: 4.19 The last 3 years in Chicago, Lieber dominated at Wrigley. His road ERA was over a point over his his home ERA each season, which is a dramatic split. As you can see, his time with the Phillies has been hurt by their very hard ballpark to pitch in with home ERA's being worse than road ERA's every year. Take him out of Philly and put him in Wrigley again? His numbers most likely improve, not regress. At worst he'll likely be a league average starter once again, which is a better guarantee than you can say for Dempster. Now, knowing that Lieber has been a ground ball pitcher when he is going good, has his GB/FB ratio taken a hit in the last few years that would make his Philly #'s out of whack since the ball jumps out of there? I seem to recall that him keeping the ball down was the reason for his success with the Cubs. Actually no. He's never been that much of a ground ball pitcher since coming from the Pirates. 1999-1.33 2000-1.69 2001-1.34 2002-1.23 2004-1.43 2005-1.29 2006-1.23 2007-1.52 So as you can see, he's remained pretty consistent in ground ball percentage over the years with a couple outliers. And badnews, I'm not trying to point out his numbers from 99-02 as an indication that he could ever be that good again. I pointed it out to show that he thrived in Wrigley Field. If he came to the Cubs, I'd expect his home split to be better or at least equal to his road split next year. If he had pitched in Wrigley the last 3 seasons instead of Citizens Bank Park, his numbers would have likely been a lot better. His road split the last few seasons hasn't been bad at all..he'd still be a league average pitcher or better in a ballpark that doesn't favor offense so much.