From the 'Secret Codes' Menu, enter any of the following codes to unlock the Historical Team:

Unlocked Team Code
1957 49ers team Goldrush
1977 Raiders Theghosts
1957 Lions team Lionpower
1978 Dolphins Cannedtuna
1958 Colts team Stables
1978 Chargers team Roller
1958 Giants team Jollygreen
1978 Oilers team Earl
1960 Eagles Greenwingst
1978 Raiders team Holy
1962 Oilers team Therewasaman
1978 Steelers team Dynasty
1962 Texans team Getem
1979 Cowboys team Comeback
1966 Chiefs team Megiveyou
1979 Bucaneers Pirates
1966 Cowboys team Whoshotjr
1981 49ers team Thecatch
1966 Packers team Champs
1981 Bengals team Tigers
1967 Cowboys team Tundra
1981 Chargers team Ironman
1967 Packers team Snowplow
1981 Cowboys team Nochance
1967 Rams team Blitzer
1983 Raiders Homesick
1968 Colts team Shocker
1984 Dolphins team Dantheman
1968 Raiders team Heidi
1985 Bears team Upset
1968 Jets team Tvtimeout
1985 Falcons team Flyaway
1969 Chiefs team Nofluke
1985 Patriots team Blowout
1969 Vikings Allflukea
1986 Broncos team Thedrive
1970 Jets Damnyankeest
1988 Bengals Nohopea
1970 Browns team Mnf
1989 Broncos team Crushed
1970 Vikings Peopleeater
1990 Raiders Oneeyed
1971 Chiefs team Overtime
1990 Bills team Wideright
1971 Cowboys Starsa
1991 Falcons team Neonlights
1971 Dolphins Longestgame
1991 Lions Toomuch
1972 Raiders Sourd
1992 Cowboys Howboutem
1972 Colts team Airshow
1992 Bills team Comebackkid
1972 Dolphins team Perfect
1993 Bills team Notagain
1972 Steelers team Lucky
1994 49ers Bythebays
1973 Bengals Junglecats
1994 Broncos Oucha
1974 Dolphins Defenderst
1994 Chargers team Charge
1974 Raiders Struggles
1996 Packers team Almost
1974 Vikings Tarka
1996 Panthers team Defense
1974 Steelers team Steelcurtain
1998 49ers team Thecatchtwo
1975 Cowboys team Hailmary
1998 Packers team Noluck
1975 Vikings team Purple
1998 Vikings team Missedchance
1977 Colts Ghosttothepost
1999 Rams Nowhereman
1977 Cowboys Usateam
1999 Titans Miracleplays