On June 28, 1994 Before a crowd of 55,021, the Rockies split a pair with the visiting Padres. The Rocks outslug the Pads to win the opener, 10 – 9, as the two teams combine for six homers. No balls leave the park in game 2, an 11 – 3 Padre win. San Diego scores a National League-record 9 runs in the 11th, and the 10 runs in the inning by two teams is one short of the NL mark.

Source
Baseball Reference June 28