The Texans auditioned a pair of defensive linemen Tuesday.
They worked out former San Diego Chargers defensive end Kendall Reyes and former Denver Broncos defensive tackle Lars Koht, according to a league source not authorized to speak publicly.
Neither free agent was immediately signed to a contract.
Reyes is a former Chargers second-round draft pick who played collegiately at Connecticut.
The 6-4, 299-pounder has 126 career tackles, 13 1/2 sacks and one interception.
He last played for Washington, but was released last week.
As a rookie with the Chargers, he had 19 quarterback pressures, 5 1/ 2 sacks and nine tackles for losses.