Girodo made his Major League debut earlier this season and tossed two scoreless innings in his lone appearance. He provides manager John Gibbons with a second left-hander in the bullpen, which could be key because veteran Brett Cecil is off to a rough start with a 5.59 ERA in 15 appearances.
Dominguez was serving as the backup at first and third base. He was added to the roster after Chris Colabello received an 80-game suspension after testing positive for a banned substance, but he didn't have a hit in seven at-bats.
Girodo was 2-0 with one earned run over 8 2/3 innings for Buffalo this season.
Gregor Chisholm has covered the Blue Jays for MLB.com since 2011. Follow him on Twitter @gregorMLB and Facebook, and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.