Dallas Cowboys OTs Tyron Smith, Doug Free both ailing

Injuries could sideline both starting offensive tackles for the Dallas Cowboys on Sunday night against the Chicago Bears.

Left tackle Tyron Smith is questionable with a back injury. He experienced spasms during practice Friday.

The Cowboys might not have the option of moving former left tackle Doug Free from right tackle, as Free is also on the injury report with a quadriceps injury.

Rookie quarterback Dak Prescott has been sacked four times in two games, and the vaunted Dallas offensive line has helped the Cowboys to a subpar 3.4-yard-per-carry rushing average against the Giants and Redskins to start the season.

Chaz Green, a third-round pick out of Florida 2015, is listed behind Free on the depth chart. La'el Collins, the Cowboys' starter at left guard, has experience at offensive tackle from his college days at LSU. Pro Bowl right guard Zack Martin also played tackle in college at Notre Dame.

The Bears have multiple injuries on both sides of the ball and lost linebackers Danny Trevathan (thumb) and Lamarr Houston (season-ending knee) to injuries in Week 2.