Herges is in his seventh MLB season and has filled a variety of roles during his career, including being used as a closer by the Giants for the first half of last season. He is expected to fill a set up role with the Diamondbacks, but if Brian Bruney's struggles continue he could fill in at closer until Brandon Lyon's return.
Vargas will be used in long relief, and could make spot starts for the Diamondbacks, but the key for both players will be to shore up a bullpen that ranks dead last in the MLB in ERA.
DeVore was part of the crowded outfield in Triple-A Tucson, and had been passed on the depth chart by Carlos Quentin, Conor Jackson (when he's not playing first base), and Josh Kroeger. DeVore was hitting .289 for the Sidewinders this season and was in the midst of a four game hit streak. He certainly left Tucson in style, his final game with the Sidewinders was Wednesday, and he was 3-4 with a double, three RBI and two runs scored.