5

Polamalu brain, Thorpe trophy case, sledgehammer temperament.
The Chiefs made it to at least the AFC Championship in each of Patrick Mahomes' first seven seasons as a starter, but unfortunately Year 8 concluded with Kansas City's star QB tearing his ACL. The result was the team limping to its first losing record since 2012.
There are certainly plenty of improvements across the roster to be made for GM Brett Veach to get this team back to operating at a championship level. Unfortunately, nobody has less cap space to work with at the moment, so most marquee additions will probably have to be made through the draft unless Veach and company can find a way to restructure a plethora of contracts. Getting Patrick Mahomes' contract restructured was a good start.
Secondary: Improving the back end is obviously encouraged, but if there's someone who can make more with less it's defensive coordinator Steve Spagnuolo, who has led six top-10 scoring defenses in seven seasons with the Chiefs.
Pass Catcher: Top two-round picks like Xavier Worthy, Skyy Moore, and Mecole Hardman simply haven't or didn't live up to expectations, and midseason trades for DeAndre Hopkins and Kadarius Toney also failed to work out in meaningful ways over the years.
Running Back: There are a number of big-name free agent running backs like Breece Hall, Travis Etienne and Kenneth Walker. Any of them would instantly be expected to put up big numbers in this offense should the Chiefs decide to spend up on the position.