From a rookie free agent's rise to the impact of a rebuilt secondary, let's rank the biggest surprises of the first month of a new season for the Chiefs.
Matt Conner of Arrowhead Addict highlights five unexpected developments driving the Kansas City Chiefs' undefeated 4-0 start to the 2026 NFL season following a disappointing six-win campaign in 2025. Running back Kenneth Walker III leads the surprises after rushing for a league-best 537 yards through four weeks, while the team's overall perfect start surpassed preseason expectations amid quarterback Patrick Mahomes' return from knee surgery.
Conner also points to undrafted rookie Kahlil Benson earning the starting left tackle job in place of the injured Josh Simmons as an unexpected success. Additionally, rookie cornerback Mansoor Delane has excelled after Kansas City traded up to draft him sixth overall, and 37-year-old tight end Travis Kelce has shown revitalized offensive production.
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