5th starter

At this point Sean Marshall has the 5th spot, but there are veterans out there the Cubs can use

This is the order I would like first:

Ben Sheets Used to be an ace, but has had arm injuries. If he came back to his regular self, he will be hard to hit.
Andy Petite Starts 30-35 games a year \, but will only sign if he comes cheap around 5-7 million.
Odalis Perez A number 2 or3 starter on every team and will be a good 4th 5th starter on the Cubs.
Mark Mulder Will come cheap because of arm injuries. Can sign him to a 1-3 million 1 year deal. If he does not do good, just cut him. He is low risk that can be a good pick-up like Edmonds and Johnson were.
Randy Wolf A lefty who could be signed 5-6 million a year and will eat innings. Because of this, we could leave Marshall in the bullpen for a long inning relief unlike Harden who has a pitch count.
Pedro Martinez I dont like this one because he is old and he has a history of arm injuries, but if the Cubs can sign him to a 1-3 million 1 year contract, it would be okay.

NOTE: This is only a back up plan if the Cubs do not acquire Jake Peavy.