The Houston Texans opened their Week 15 practice on Wednesday with some worrying developments in their backfield, as rookie running back Woody Marks and veteran Nick Chubb did not take part in practice ahead of Sunday’s road matchup against the Arizona Cardinals. Marks didn’t hit the field due to a knee injury, while Chubb sat out with a sore rib.

Marks, Houston's primary ball-carrier in recent weeks, hurt his foot early in the Week 13 game against the Indianapolis Colts , but returned, finishing with 19 carries for 64 yards and one catch for five yards in the 20-16 win. He played through the foot injury last week during the 20–10 victory versus the Kansas City Chiefs , but suffered an ankle injury during one series, missing only a single play that fellow back Dare Ogunbowale tu

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