From a Wall Street Journal obit by Andrew Beaton and Laine Higgins headlined “Mike Leach, Coach Whose ‘Air Raid’ Offense Revolutionized Football, Dies at 61”:

Mike Leach, the oddball college football coach whose embrace of the unorthodox and explosive “Air Raid” offense was derided as a gimmick before it proliferated and revolutionized the sport, died at the age of 61. The cause of death was complications from a heart condition.

“Coach Mike Leach cast a tremendous shadow not just over Mississippi State University, but over the entire college football landscape,” said Mississippi State President Mark Keenum. “Mike’s keen intellect and unvarnished candor made him one of the nation’s true coaching legends.”