late-inning pressure (1935)

“Wes was in a little tight spot in the eighth. Owen singled with one gone, and Pete Fox, batting for Auker, whacked a clean single to left. Here Wes put on his famous late-inning pressure.” Burt Whitman, “Graham’s Fleet Infield Pinch Single Clinches Wes Ferrell’s 24th as Sox Trip Tigers, 5-4; Greenberg Hits 36th,” Boston Herald, September 18, 1935, p22

No earliest use given in 2009 Dickson Baseball Dictionary