These appear to be the Royals' City Connect hats
Ranking MLB's City Connect uniforms - ESPN
Royals' City Connect Cap Leaks via Online Retailer
City Connect - Wikipedia
Royals City Connect uniform
Kansas City Royals unveil City Connect uniforms : r/baseball
Kansas City Royals pay tribute to iconic fountains and art deco architecture with City Connect uniforms
Royals release images of their new City Connect jerseys
Fountains of Reign: Kansas City Royals Unveil New City Connect Uniform – SportsLogos.Net News