hot grounder (1866)

“Oakhill hit a hot grounder between first and second bases, and made his first.” “The Great Game Between the Athletics, of Philadelphia, and the Atlantics, of Brooklyn, Yesterday,” The Press (Philadelphia), October 23, 1866, p8

Previous earliest use (Dickson Baseball Dictionary, 3rd edition, 2009):
1887.  “Sutcliffe retired on a hot grounder to Caruthers.” (Detroit Free Press, Oct. 27).