Luck Out (1902)

In the sixth inning it rained so hard that Kane announced to the players that he would call the game at the end of the inning, but at the protest of the Vicksburgers who were hoping against hope, he allowed the game to proceed, with the result that instead of Vicksburg lucking out, Baton Rouge scored another run.Vicksburg Evening Post, July 17, 1902, p4 [Jon Simon]

No earliest use given in Dickson Baseball Dictionary