Duke spent the 2011 campaign with the Arizona Diamondbacks, compiling a 3-4 record and a 4.93 earned run average in 21 appearances (nine starts). Duke started the season, his first one with the Diamondbacks, on the disabled list with a fractured pitching hand.
The Texas native was a 2001 draft pick of the Pittsburgh Pirates, with whom he spent his first six pro seasons. Duke was selected to the All-Star game in 2009 while with the Pirates.
In 181 games (168 starts), Duke has compiled a record of 48-74 with a 4.56 ERA and 537 strikeouts.