None
2007 Patriots 1972 Dolphins
There are 47 seasons in a NRL season
Not to my information
22324 undefeated teams
The NRL was formed in 1908 only starting with 8 teams.
the Colts have never gone undefeated,,,only two teams have.1972 Miami Dolphins (14-0)2007 New England Patriots (16-0)
16
Only 2 teams have ever gone undefeated. The 1974 dolphins and 07 patriots.
The Utes have had 2 undefeated seasons in their history. One in 2004, and one in 2008.
11
There are no more undefeated teams left in the National Football League during the 2010-2011 season
9