Tiger Woods tees off during the first round of the Quicken Loans National at Congressional Country Club in Bethesda, Maryland, June 26, 2014. AFP PHOTO / Jim WATSON (Photo credit should read JIM ...

Ely Callaway borrowed the name for his new club from a World War I cannon, then fired a shot that started a revolution in golf. Callaway, whose "Big Bertha" drivers paved the way for oversized clubs ...

Ely Callaway's posthumous book, "The Unconquerable Game," details his life in golf and business. Brian Minbiole, a longtime Callaway employee, offers insights into the book and Callaway's personality.

Ely Callaway borrowed the name for his new club from a World War I cannon, then fired a shot that started a revolution in golf. Callaway, whose ``Big Bertha'' drivers paved the way for oversized clubs ...