The Kansas City Chiefs entered the offseason with a bad taste in their mouths after falling short in Super Bowl LIX against the Philadelphia Eagles. Now, the focus shifts to the upcoming season, with training camp set to begin on Tuesday, July 22, and run through Aug. 13—leading directly into the preseason and, ultimately, Week 1 of the regular season. The Chiefs will open the 2025 campaign on Friday night, Sept. 5, in São Paulo, Brazil, against the Los Angeles Chargers.