Big Red Machine (1969)

“But as to the artificial grass . . . well, they realized it would be an aid to their already potent offense that Manager Dave Bristol and his players like to refer to as ‘The Big Red Machine.'” Bob Hertzel, “Reds Glad to be Home,” Cincinnati Enquirer, July 15, 1969, p33.

No earliest use given in 2009 Dickson Baseball Dictionary