Answer: Chad Paronto
If you figured this one out before the end, then a major hat tip to you. Paronto was one of those random middle relievers of the mid 2000s that never really stuck anywhere long enough to have his MLB career remembered.
However, his two best seasons (both in IP and ERA) came during his time in Atlanta. He wasn't the guy trusted for the high-leverage moments, but if you were watching a lopsided Braves game in the mid 2000s, chances are you saw Chad Paronto pitch. Over the 177 games he appeared in during his seven-year career, Paronto produced a 6-12 record, 4.32 ERA, 4.66 FIP, and 0.1 fWAR.