Salazar did not make the Astros' Opening Day roster, Matt Kawahara of the Houston Chronicle reports.
He's out of minor-league options, so Salazar will have to be exposed to waivers first if the Astros intend to send him to Triple-A Sugar Land. The 30-year-old has seen spot duty with Houston the past three years, slashing .232/.318/.268in 67 plate appearances.