Texans coach Gary Kubiak said today that even though Matt Schaub is healthy, Keenum will be the starter to see what he can do.
Kubiak went on to say that no decision has been made for the rest of the season.
In his first start against Kansas City, Keenum threw for 271 yards and a touchdown to DeAndre Hopkins.
Schaub was back in practice today and will prepare this week, but he will back up Keenum after struggling much of the season.
Running back Arian Foster (hamstring) only worked with team trainers today and backup Ben Tate (ribs) missed practice.
Kubiak says he is "very concerned" and will work to get running backs Deji Karim, Dennis Johnson and Ray Graham prepared to play.
The Associated Press contributed to this report