Depends on how well you think Gallagher could do in Marshall's spot. Almost .200 OPS points is a MASSIVE improvement. We can't just look past that fact. I understand that...but is it worth the gamble that you'd be taking in putting a completely untested rookie pitcher into the rotation? I say no. But I understand both sides. Assuming you think the Cubs still have a good shot at the playoffs with a Gallagher starting the rest of the way, you also have to take into account that in the playoffs, Marshall probably doesn't see much, if any, time, while Griffey can very well have a significant impact.