Hughes was expected to reach the ballpark at some point during Friday night's game. The move returns him to the bullpen in which he was such a big part during his rookie season in 2012.
Hughes ranked among the Majors' top rookie relievers last season when he appeared in 66 games and had an ERA of 2.85. He struggled to a 4.61 ERA in 13 outings this season prior to being optioned at the end of April.
In Indianapolis, Hughes did not allow a run in six appearances and 6 2/3 innings, with seven strikeouts and three walks.
Tom Singer is a reporter for MLB.com and writes an MLBlog Change for a Nickel. He can also be found on Twitter @Tom_Singer. This story was not subject to the approval of Major League Baseball or its clubs.