Start the game, then select  'yes' to keep records. 
Now enter the following records for the desired player 
and a whole league of special hidden characters become 
available. The lengths game programmes will go to is amazing:

Junior Seau  JR Jun 1
John Elway   WaySep 30
Marv Albert MrvDec 31
Frank ThomasBigDec 6
Newt Gingrich     NewAug 12
Pirate Bill     SalFeb 2
Mr.Happy     MjtMar 22
Dufus the clown    GrrJun 19
3 feet under TodApr 17
Mr.Unhappy  GemNov 3
Ooohh     JlhJan 26
WhoWhoJan 1
Brained  BcsJan 7
Monkey Boy  PjpNov 2
Howie     BceJul 10
Jim JungJkjDec 13
Huh  CbrJun 25
Cheryl Swoopes   SwoJan 1
Rebecca Lobo LobJul 4
Carol Blazejowski BlzMar 1
Bob Lanier    LanSep 10
Air NickArnMay 18
George Cervin     IceApr 7
XX Stinger   MssOct 26
XX ShamrockJhgAug 26
Diamond Dave     DjpJun 29
Chris Slate   JcsDec 8
Sausage Boy TvcOct 3
Richard Szeto    RtsFeb 25