The problem with Marcum is that you know he'll eventually hit the wall, because of the type of pitcher he is. The question is when that'll happen, and it's hard to predict. He may have 3 or 4 more good years left in him, but he may only have 1 or 2. It's pretty risky to sign him. If we lose Greinke, I'd consider it for 2-3 years tops. There's no way I'd go past 3. Even then, it would have to be at a reasonable price, or I wouldn't risk it.