The "savings" could also include keeping him from blowing a game or two where you have a big lead between now and the end of the season. In a tight playoff race, what's that worth? I'm not saying he HAS TO be cut loose or made a Coach - although I'd like to see that happen personally - but if he's going to be kept on the roster, he simply has to be used more regularly because you're better off using a position player to pitch in laughers if you're not going to keep him sharp. He's now been used 7 times (11 IP) since the All-Star break, and he's given up 20 hits and 12 ER over that period. Culberson was better than that.
Smith is a much tougher decision. Even though he's struggling, he's not blowing games very often. We dealt with Melancon causing us to hold our breath seemingly every night, so how is this different? I'd be completely for a change if you had someone else that was currently pitching lights-out, but the only guy in the pen doing that right now is Matzek and you have no idea how he will respond if you ask him to take over the 9th inning since he's never done it before. If you're going to make a change with the guys currently on the roster, you have to go to Rodriguez - then the question becomes who is Snitker going to use as his precious "Swiss Army Knife" guy???