The offensive line is critical for Dallas' success, as it helps clear rushing lanes and keeps quarterback Dak Prescott upright. Smith is an important cog up front as a four-time Pro Bowler and two-time first-team All-Pro member, and his absence would be significant moving forward.
His absence could be exacerbated Sunday since running back Ezekiel Elliott will begin serving his six-game suspension, meaning the line will be tasked with blocking for less-talented backs in Alfred Morris, Darren McFadden and Rod Smith.
Dallas could turn toward Byron Bell with Smith out of the lineup. Bell is versatile enough to play at guard or tackle, but he will struggle to be the force Smith has been throughout his career.
Dallas could use its Pro Bowl lineman back and healthy as it strives to defend its NFC East crown.