The Texans worked out defensive backs Chykie Brown and Adairius Barnes on Tuesday, according to a league source not authorized to speak publicly.
Brown is a former Ravens fifth-round draft pick from Texas.
Brown lives in Houston and was an all-state and all-district selection at North Shore.
He's also played for the New York Giants and Cincinnati Bengals and has overcome a knee injury that forced him onto injured reserve last season.
For his career, Brown, 30, has 81 tackles and 10 passes defended.
Barnes is a former Detroit Lions undrafted free agent from Louisiana Tech.