Triple Play '97 Codes -

Home runs:
Hold R1 + R2 + L1 + L2 and press Up(2), Triangle(2), Up(2), X(2). The sound of a chime will confirm correct code entry. This code must be entered for each new batter and is valid during a regular game or a home run derby.

Mystery stadium:
Press L1, R1, L1, then hold R1 and press Start in the stadium select screen.

Super players:
Enter the custom players option in Manager screen. Enter one of the following case-sensitive names for a player with an unlimited amount of skill to distribute:

Bruce McMillian
Steve Rechstchattner
Bill McCormick
John Burk
Kevin Loh
Wendall Harlow
Louise Read
Dennis Hirsch (fast running center fielder)
Erik Kiss
Jon Spencer (can pitch 160 mph fastballs)
Chris Johnson
Eric Pauker
Kevin Pickell
Mark Gipson
Mike Swanson (always hits pitcher when batting)
Geoff Coates
Edwin Gomes
Tony Lee
David Demorest
Craig Hui
Mike Sokyrka
Frank Faugno
Gary Lam
Brent Neilsen
Josh Holmes