As stated in a previous post, I believe it is more important to have Carlos Marmol available to come into games in situations when the game is on the line and there is no room for error. If you don’t get out of these situations, you don’t get to the situation where you can bring your closer in. The closer has room for error, and can give up a leadoff hit without it beating him. I believe Kerry Wood is fine in this role.
I would like to suggest a somewhat different scenario. Assuming you can warm up Wood and Marmol accordingly, I would have Marmol ready for the game-on-the-line situations, and then use Wood as the closer. However, if the Cubs had the lead going into the opponent’s 8th inning and didn’t need to use Marmol in a game-on-the-line situation, I would bring in Wood. If Wood shuts them out in the 8th, Marmol can close. If Wood gets in trouble in the 8th, Marmol can come in and get out of trouble, and then pitch the 9th.