Dominguez was designated for assignment Monday, Evan Drellich of the Houston Chronicle reports. The Astros need a spot on the 40-man roster for top prospect Carlos Correa, who was recalled from Triple-A Fresno on Monday. While 25-year-old players with over 1,200 career big-league at-bats typically aren't available on waivers, Dominguez will likely slide through unclaimed, as he hasn't made any real progress in the batter's box. Following last year's dreadful performance with the Astros, he owns a .251/.289/.371 slash line for Triple-A Fresno this season.