If an invalid team is given, return unknown.
If an invalid team is given, return unknown.

verdimrc/nfldb,verdimrc/nfldb,codeaudit/nfldb,bparafina/nfldb,nivertech/nfldb,BurntSushi/nfldb,nivertech/nfldb,BurntSushi/nfldb,bparafina/nfldb,codeaudit/nfldb