49ers success driven by two key factors

Writer Jack Stewart argues that the San Francisco 49ers' undefeated start has been driven largely by improved interior defensive line play and rookie depth. Stewart highlights the impact of defensive tackles Osa Odighizuwa, Gracen Halton, and Sebastian Valdez, noting how their interior pressure has revitalized a pass rush that ranked last in the league with only 20 sacks last season.

Stewart also credits rookie contributions for sustaining the team despite injuries, emphasizing running back Kaelon Black for easing Christian McCaffrey's heavy workload. Additionally, Stewart points to key defensive plays against Washington by rookies Romello Height and Jaden Dugger as vital factors in the team's ongoing success.