Four keys to Sunday's game

GETTING WIDE: The Cowboys have had a difficult time involving their wide receivers in the passing game through four games. So far only 31 of Tony Romo's 76 completions have gone to Roy Williams, Patrick Crayton, Miles Austin or Sam Hurd. The Chiefs might be the perfect opponent to get the wide receivers going. Of the 77 completions the Kansas City defense has allowed in the first four games, 42 have gone to receivers. In their last two games the Chiefs have allowed two 100-yard receivers - Philadelphia's DeSean Jackson (6 for 149) and New York's Steve Smith (11 for 134). Crayton had 135 yards in the season opener at Tampa Bay but has not come close to 100 yards since. To take possibly mounting pressure from the running game, the Cowboys must get the ball on the flanks.

THIRD DOWN DIFFERENCE MAKER: In the last two games the Cowboys have allowed Carolina and Denver to convert just three of 18 third-down chances, a sparkling improvement over the first two games. And today the Cowboys face the worst third-down team in the NFL. Kansas City has converted only 9-of-51 tries this season, a woeful 17.6 percent. Coach Todd Haley said the problems have been on first and second down, but what the Cowboys have to improve on today is how many yards they allow on third down. On three third-and-17 or longer situation against the Broncos, the defense allowed 13, 17 and 8 yards. While they got off the field, they allowed too many yards to make an appreciable difference in field position. Against the Chiefs, they not only have to continue their third-down success defensively, but shut them down completely.