The Astros released Diaz on Friday, Matt Kawahara of the Houston Chronicle reports.
Roughly a month after reuniting with Houston, Diaz will now be let go in order to make room for Shay Whitcomb, who was promoted from Triple-A in a corresponding move. The 34-year-old Diaz appeared in only two games while with the Astros, going 0-for-4 with two strikeouts. He'll now presumably look to latch on with another organization on a minor-league deal.