Taking advantage of a ground rule change which scores balls hit over Chicago’s inviting 180-foot LF fence as home runs (instead of doubles)‚ five players hit round-trippers in the White Stockings’ National League home opener against Detroit‚ winning 15 – 5. Chicago will hit 142 homers – last year they hit 13 – during the 112-game season (more than 90 percent of them at home) to set a record that will last until the 1927 New York Yankees. The rule change appears to be unilaterally made by Cap Anson‚ and the other league owners will squawk to no avail. But the league will set a minimum distance of 210 feet for an outfield fence after the season.

On May 29, 1884 — Taking advantage of a ground rule change which scores balls hit over Chicago’s inviting 180-foot LF fence as home runs (instead of doubles)‚ five players hit round-trippers in the White Stockings’ National League home opener against Detroit‚ winning 15 – 5. Chicago will hit 142 homers – last year they hit 13 – during the 112-game season (more than 90 percent of them at home) to set a record that will last until the 1927 New York Yankees. The rule change appears to be unilaterally made by Cap Anson‚ and the other league owners will squawk to no avail. But the league will set a minimum distance of 210 feet for an outfield fence after the season.

Source:
Baseball Reference May 29