ATLANTA -- Dallas Cowboys linebacker Sean Lee exited due to a hamstring strain suffered in the first quarter of the team's 27-7 loss to the Atlanta Falcons.
Lee missed two games earlier this season because of a hamstring injury. Lee missed the final five plays of Atlanta's second drive that ended in a Matt Bryant 50-yard field goal. Jaylon Smith will replace Lee in the base and nickel defenses.
In the two games Lee missed this season, the Cowboys gave up an average of 164 yards rushing to the Los Angeles Rams and Green Bay Packers. After Lee left the game, the Cowboys allowed 45 rushing yards on nine carries in the first half.
Coming up, the Cowboys play three games in 12 days, with the Philadelphia Eagles visiting AT&T Stadium on Nov. 19 followed by back-to-back Thursday games against the Los Angeles Chargers (Thanksgiving) and Washington Redskins (Nov. 30).
The Cowboys were already without running back Ezekiel Elliott (suspension) and left tackle Tyron Smith (groin).