The Texans signed veteran safety Don Jones to their 53-man roster following a successful tryout and promoted defensive lineman Brandon Dunn to the active roster from the practice squad.
They placed safety K.J. Dillon on injured reserve along with outside linebacker Brennan Scarlett.
Dillon has a torn anterior cruciate ligament.
The Texans auditioned three defensive backs Tuesday, including Jones, a former Miami Dolphins and New England Patriots safety Don Jones. Jones is a former Dolphins seventh-round draft pick.
They also worked out cornerbacks Denzel Rice and Charles Gaines. Gaines played collegiately at Louisville. He was drafted in the sixth round by the Cleveland Browns last year, but didn't make the roster this year.