The 42nd edition of a local MLK Day march is expected to draw an even greater turnout than usual this year, while many other events will mark the holiday in unique ways.

King would also inspire baseball player Curt Flood, who challenged Major League Baseball’s reserve clause in 1970, bringing an end to what was a St. Louis Cardinal Hall of Fame career. Flood would lose his case in the U.S. Supreme Court, but his fight would open the door for free agency five years later.