Kansas City Chiefs start NFL season 4-0 with strong defensive performance despite injuries.

The Kansas City Chiefs are off to a 4-0 start in the NFL season, primarily due to a strong defensive performance. Despite injuries to key offensive players, the Chiefs' defense has effectively contained opponents, building on last season's No. 2 ranking in scoring and total defense. With standout players like Chris Jones and Trent McDuffie, the defense is critical as they prepare for their upcoming game against the Saints.