Marks visited the sideline tent during Sunday's contest against the Giants due to an apparent left leg injury, Aaron Wilson of KPRC 2 Houston reports.
Marks walked off the field without a noticeable limp late in the third quarter to be examined. The Texans have only one other healthy running back (Dare Ogunbowale) on the game-day roster with David Montgomery (groin) sidelined for a second game in a row.