Willie Keeler, one of the smallest players and best bunters, drives the ball past startled LF Ed Delahanty of the Phillies for an inside-the-park grand slam and an 8 – 5 victory for Brooklyn.

On May 15, 1899 — Willie Keeler, one of the smallest players and best bunters, drives the ball past startled LF Ed Delahanty of the Phillies for an inside-the-park grand slam and an 8 – 5 victory for Brooklyn.

Source:
Baseball Reference May 15