| 2021-09-01 | Jody Fortson on His Long Journey to the Chiefs’ 53-Man Roster: “I Just Kept Working” |
| 2021-09-06 | Chiefs Set to Celebrate 30th Season of Red Friday; Flag Sales to Again Benefit Ronald McDonald House Charities |
| 2021-09-07 | A Tale of Football, Family, and Inclusion Through the Eyes of Bobby Bell |
| 2021-09-09 | Patrick Mahomes on the Chiefs’ Recent Early-Season Success: “We Stress Starting Fast” |
| 2021-09-09 | Tico Sports is Bringing Chiefs Football to Life in Spanish |
| 2021-09-09 | Chiefs Announce High School Coaches of the Week For Week One of the 2021 Season |
| 2021-09-10 | Here’s How to Get Your Red Friday Flag This Year, Plus What’s Going on Around Town |
| 2021-09-10 | Chiefs Recognize Staff Sgt. Janina Felka-Burns as This Week’s Tribute to the Troops Honoree Presented by Crown Royal |
| 2021-09-12 | Week 1 Injury Report | Chiefs vs. Browns |
| 2021-09-12 | How to Watch and Listen | Week 1: Chiefs vs. Browns |
| 2021-09-12 | Week 1 Inactives | Chiefs vs. Browns |
| 2021-09-13 | Chiefs Complete Thrilling Comeback to Defeat Browns, 33-29, in Season-Opener |
| 2021-09-13 | 10 Quick Facts About the Chiefs’ Week 1 Victory Over the Browns | Upon Further Review |
| 2021-09-14 | Power Rankings Week 1 | Where do the Chiefs Rank After Sunday’s Win Over the Browns? |
| 2021-09-15 | Patrick Mahomes Named AFC Offensive Player of the Week |
| 2021-09-15 | Rookie LB Nick Bolton on his NFL Debut: “It Was About Playing Fast and Trusting Myself” |
| 2021-09-16 | Chiefs Announce High School Coaches of the Week for Week Two of the 2021 Season |
| 2021-09-17 | Week 2 Injury Report | Chiefs vs. Ravens |
| 2021-09-19 | How to Watch and Listen | Week 2: Chiefs vs. Ravens |
| 2021-09-19 | Week 2 Inactives | Chiefs vs. Ravens |
| 2021-09-20 | Tyrann Mathieu on the Chiefs’ Loss to Baltimore: “I Look Forward to Seeing Our Group Respond” |
| 2021-09-20 | Five Quick Facts About the Chiefs’ Week 2 Loss to Baltimore | Upon Further Review |
| 2021-09-21 | Chiefs Kingdom Raises More than $900,000 for Ronald McDonald House Charities of Kansas City |
| 2021-09-23 | Chiefs Announce High School Coaches of the Week For Week Three of the 2021 Season |
| 2021-09-23 | From Undrafted Free Agent to Frequent Contributor, Byron Pringle Continues to Impress |
| 2021-09-23 | Kansas City Chiefs Highlight Stadium and Fan Experience Enhancements for 2021 Season |
| 2021-09-24 | Chiefs Kick Off Second Year of “Kingdom United” Program as Part of Club’s Inspire Change Efforts |
| 2021-09-25 | Chiefs Recognize Sgt. 1st Class Terrie Rivera as This Week’s Tribute to the Troops Honoree Presented by Crown Royal |
| 2021-09-25 | The “Extra Yard for the Environment” Program Has Made the Chiefs’ Conservation Efforts Championship-Caliber |
| 2021-09-26 | How to Watch and Listen | Week 3: Chiefs vs. Chargers |
| 2021-09-26 | Week 3 Inactives | Chiefs vs. Chargers |
| 2021-09-26 | Patrick Mahomes on Sunday’s Loss to the Chargers: “It’s About How You Respond” |
| 2021-09-27 | Five Quick Facts About the Chiefs’ Week 3 Loss to Los Angeles | Upon Further Review |
| 2021-09-30 | Chiefs Announce High School Coaches of the Week for Week Four of the 2021 Season |
| 2021-09-30 | Patrick Mahomes on Moving Forward: “If You Have Championship Swagger, You Don’t Let a Loss in September Affect Your Mindset” |
