The Arizona Diamondbacks added two pitchers on Friday, getting reliever Matt Herges in a trade with San Francisco and claiming starter Claudio Vargas off waivers from Washington. The Diamondbacks sent minor league outfielder Doug DeVore to the Giants for Herges. Herges was designated for assignment last Sunday, a day after San Francisco acquired reliever LaTroy Hawkins in a trade with the Chicago Cubs. The 35-year-old righty was 1-1 with a 4.71 ERA in 21 games for the Giants this season.