August 17, 1980: George Brett raises batting average above .400 – Society for American Baseball Research

Games Project – Society for American Baseball Research

Luis Arráez's chase for .400 brings back memories for George Brett

Sports Persons of the Year - Fairfield County Sports Commission

A Sudden Slide Into Uncertainty - Sports Illustrated Vault

Sept. 19, 1980 – In the George Brett goes 2-for-4, keeping his season batting average at .400

2021 Troy Baseball Media Guide by Troy University Athletics - Issuu

The Royals' George Brett goes 4-for-4 to raise his average to .401

George Brett's Restaurant Kansas City - George Brett's restaurant kc plaza

The Surprising Story of How the Walk Became Part of Baseball

2023 St. Paul Saints Media Guide by stpaulsaints - Issuu

When George Brett Chased .400. Do you remember?, by Brian G (aka 'bumpyjonas') - he/him, The Press Box

George Brett's top moments of career

Yesterday in Baseball - In 1990 at the age of 37, George Brett won his third batting title with a .329 mark – becoming the first player to win a batting title

Tee-Ball All-Star – SABR's Baseball Cards Research Committee

Ted Williams goes 6-for-8 in doubleheader to finish season at .406