The Texans signed Smith to their active roster Thursday, Aaron Wilson of Sportstalk 790 Houston reports.
Smith was elevated from the Texans' practice squad for their Week 14 matchup against Seattle, but he'll now land a contract to join the 53-man roster. Jonathan Greenard (illness), Derek Rivers (illness) and Jacob Martin (illness) were all placed on the reserve/COVID-19 list recently, so Smith could draw the start in Sunday's Week 16 matchup against the Chargers.