There are several factors aiding the Cubs, many that have been addressed: 1) This Cubs team, despite notable exceptions can put the ball into play, and refrain from striking out a bunch of times 2) If Eyre is ok, the Bullpen is pretty shut down, meaning that A) Starters won't have to labor as much, and B) If the Cubs can get a lead, they can feel confident that they don't need the extra offense. Sure you won't see as many 13-2 games, but you will see several 4-3 games in the Cubs favor 3) The rookies Murton and Cedeno have more then stepped up so far this year. While its not out of the realm that they will regress, so far they have showed no signs of that. Heck, Cedeno even drew 2 walks yesterday 4) The NL is weak, even if the Cubs play slighty under .500 with Lee gone, and the Cardinals play 10 games over .500, the NL Central will still be in reach if the pitchers and Lee are healthy for July-September Bottom line: I'm not saying the Cubs are going to win for sure, no one really knows how much of a loss Lee is to the team. Most people would argue that hes the single most important individual piece on the team. But the team can survive if he can come back in 2-3 months