It was their second game to feature this technology (Joe Montana II: Sports Talk Football being the first).

In order to produce the running commentary, Sega contracted sports announcer Lon Simmons as well as the vocal reproduction company Electronic Speech Systems to record the unique phrases and play calls for the game.

Instead of a running commentary, Super League '91 uses a constant soundtrack of Japanese drums during the game and a remix of the umpire voices to a techno tune at the main menu.

There is no way to see any advanced statistics other than at the end of the game in the Japanese version (i.e., errors and hits).

If the ball is hit far enough, a black-and-white picture of Sonic the Hedgehog appears on a billboard with his name below it can be seen.