Could Sean Marshall be an option for the Cubs' rotation?

Last year around this time the Cubs had some serious bullpen issues, which led Lou Piniella to do the unthinkable (although not to me) and move Carlos Zambrano to the bullpen. This year, the roles are reversed, as the starters are the ones struggling. With injured starters Randy Wells and Andrew Cashner at least a few weeks away from returning, maybe its time to think outside the box once again and convert Sean Marshall back to a starter (at least temporarily). As I discussed in yesterday's post, there is not a lot of help to be found in the minors and fill-ins Casey Coleman and James Russell don't appear to be the answer. Could Marshall be an option? Marshall last started a game in 2009, when he was still serving as the Cubs long man and spot starter. Since then, he has been used mostly as a set up man. If the Cubs were to convert him to a starter, he would need to be stretched out, which (using Zambrano last year as a guide) could take about 2 weeks. (He co...