The Astros have designated righty reliever Oscar Villarreal for assignment. He has pitched in 35 games (0 starts) for the Astros this season and he is 1-3 with a 5.02 ERA and a 1.57 WHIP. The Astros have recalled righty reliever Dave Borkowski from AAA ball to replace Villarreal in the bullpen. Borkowski has pitched in 18 games (0 starts) for the Astros this season and he is 0-2 with a 6.86 ERA and a 1.86 WHIP. Don’t expect much out of Borkowski who has never been that good of a pitcher at the major league level.