Lamb left Sunday's game against the Falcons due to a bruised arm, Todd Archer of ESPN.com reports.
Lamb sustained the injury in the first half but still put together one of his best performances of the season before exiting, sitting on six catches (on seven targets) for 94 yards and two touchdowns by the end of the third quarter. Considering Dallas is blowing out Atlanta, the Cowboys likely will play it safe with one of their top skill-position players and not risk further aggravation of the issue. Dak Prescott thus will have Amari Cooper, Michael Gallup, Cedrick Wilson, Noah Brown and Malik Turner at wide receiver while Lamb is off the field.