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Certainly his pitching style has changed - and he's dealt with some injury issues that might've taken some zip off his fastball. Thing about his stint in Atlanta, though, is that he was warmed up in nearly every game. Warming up and not coming into a game can harm a pitcher, especially if it's done frequently.
A cheap veteran with some closing experience (granted, his splits might be too wide to let that happen again) in a big park? Yes! The Killer Peays! (Shawn Kelley & GS52 being from the same college - Austin Peay State - and where Zduriencik got his Masters degree as well)...
Also check out his groundball/flyball trends on Fangraphs. I like eeet a lot!