Cut Fastball (1970)

….Lolich has been on target with his new found ‘cut fastball’….” Jim Hawkins, “Lolich vs. Tribe in Home Opener,” Detroit Free Press, April 17, 1970, p38

Previous earliest use (Dickson Baseball Dictionary, 3rd edition, 2009):
The term probably originated in the early 1980s, although the pitch itself has been around at least since the 1930s.