Hughes, 28, appeared in 57 games for the Royals last year, posting a 3.83 ERA with 5.4 K/9 and 3.8 BB/9. The Royals selected the left-hander in the 11th round of the 2003 draft.
Delaney has appeared in just one big league game so far, but the 26-year-old right-hander has plenty of minor league experience. He has a 2.96 ERA with 9.5 K/9 and 1.9 BB/9 in 242 minor league relief appearances. Last year he posted a 3.44 ERA with 8.4 K/9 and 2.3 BB/9 in 83 2/3 innings for the Twins' top affiliates.