As a columnist for Time magazine, among many other publications, Tom Callahan witnessed an extraordinary number of defining moments in American sport across four decades. He takes us from Roberto Clemente clinching his 3,000th, and final, regular-season hit in Pittsburgh; to ringside for the Muhammad Ali–George Foreman fight in Zaire; and to Arthur Ashe announcing, at a news conference, that he’d tested positive for HIV. There are also little-known private moments: Joe Morgan whispering thank you to a virtually blind Jackie Robinson on the field at the 1972 World Series, or Kareem Abdul-Jabbar saying he was more interested in being a good man than in being the greatest basketball player.

The winner of more than 90 championships, including four Masters Tournaments, Arnold Palmer was a legend in 20th-century sports: a supremely gifted competitor beloved for his powerful hitting, his nerve on the greens, and his great rapport with fans. Perhaps above all others, Palmer was the reason golf’s popularity exploded, as the King of the links helped define golf’s golden age along with Jack Nicklaus and Gary Player. In addition to his talent on the golf course, Palmer was a brilliant entrepreneur off it, and one of the first sportsmen to create his own successful marketing brand. But beyond his business acumen, Palmer was always a larger-than-life character, and ARNIE recounts a host of unforgettable anecdotes from a long life in the spotlight.