Stewart's an interesting guy. Defesnively, UZR/150 suggets he's below average, Plus/Minus suggests he's average and fan scouting suggests he's above average. In any case, he'd be an upgrade over Casey in that respect. He strikes out, a lot. And Stewart should never, ever be allowed to face a LHP, so you're probably looking at a platoon if you want to maximize the value out of the position. And he's going to make close to $3M next year if he goes to arbitration again. Would you want to pay him and someone else (McGehee?) to man the position? Also not sure if Colorado would want to unload him now, when his value is so low. On the flip side, he's hitting even worse than McGehee is right now. You'd be taking a risk on the remainder of season upside. Good idea, though.