CHICAGO -- The Cubs are in need of a fifth starter, but then again, they may not be.
Brett Anderson was placed on the 10-day disabled list on Sunday because of a low back strain, creating an opening in the rotation. However, with an off-day on Thursday, the Cubs could go with four starters and not have anyone pitch on short rest.
They do have two options to fill Anderson's spot: Mike Montgomery, who is in the bullpen now, and Eddie Butler, who is at Triple-A Iowa.
"We're considering both options," manager Joe Maddon said Sunday about inserting someone or just going with a four-man rotation.