The Superbowl began as a championship game between two football leagues -- the American Football League (AFL), and the much older and established National Football League (NFL). Starting with the 1970-71 season, the two leagues merged, and the Superbowl became the championship game for the National Football League, with the two contenders being the champions of the two conferences -- the American Football Conference (AFC) and the National Football Conference (NFC).

It could be said that only one AFL team ever won the Superbowl -- the 1968-69 New York Jets -- as the merger had already been made official by the time the Kansas City Chiefs beat the Minnesota Vikings the following year. The '69 Jets were quarterbacked by the flamboyant Joe Namath. On the eve of Superbowl III, Namath guaranteed a win for the Jets. With the merger of the two leagues, several teams moved from the NFL/NFC into the new AFC. The first Superbowl played under the "new" format (1971) saw a former NFL team (the Baltimore Colts) representing the AFC and winning.

Another notable game came in 2008, when the New York Giants spoiled the dreams of an unbeaten season for the New England Patriots, becoming only the second wild card team in history to win the championship.

#	Season	Winner	Loser	Score
1	1966-67	Green Bay Packers	Kansas City Chiefs	35-10
2	1967-68	Green Bay Packers	Oakland Raiders	33-14
3	1968-69	New York Jets	Baltimore Colts	16-7
4	1969-70	Kansas City Chiefs	Minnesota Vikings	23-7
5	1970-71	Baltimore Colts	Dallas Cowboys	16-13
6	1971-72	Dallas Cowboys	Miami Dolphins	24-3
7	1972-73	Miami Dolphins	Washington Redskins	14-7
8	1973-74	Miami Dolphins	Minnesota Vikings	24-7
9	1974-75	Pittsburgh Steelers	Minnesota Vikings	16-6
10	1975-76	Pittsburgh Steelers	Dallas Cowboys	21-17
11	1976-77	Oakland Raiders	Minnesota Vikings	32-14
12	1977-78	Dallas Cowboys	Denver Broncos	27-10
13	1978-79	Pittsburgh Steelers	Dallas Cowboys	35-31
14	1979-80	Pittsburgh Steelers	Los Angeles Rams	31-19
15	1980-81	Oakland Raiders	Philadelphia Eagles	27-10
16	1981-82	San Francisco 49ers	Cincinnati Bengals	26-21
17	1982-83	Washington Redskins	Miami Dolphins	27-17
18	1983-84	Los Angeles Raiders	Washington Redskins	38-9
19	1984-85	San Francisco 49ers	Miami Dolphins	38-16
20	1985-86	Chicago Bears	New England Patriots	46-10
21	1986-87	New York Giants	Denver Broncos	39-20
22	1987-88	Washington Redskins	Denver Broncos	42-10
23	1988-89	San Francisco 49ers	Cincinnati Bengals	20-16
24	1989-90	San Francisco 49ers	Denver Broncos	55-10
25	1990-91	New York Giants	Buffalo Bills	20-19

#	Season	Winner	Loser	Score
26	1991-92	Washington Redskins	Buffalo Bills	37-24
27	1992-93	Dallas Cowboys	Buffalo Bills	52-17
28	1993-94	Dallas Cowboys	Buffalo Bills	30-13
29	1994-95	San Francisco 49ers	San Diego Chargers	49-26
30	1995-96	Dallas Cowboys	Pittsburgh Steelers	27-17
31	1996-97	Green Bay Packers	New England Patriots	35-21
32	1997-98	Denver Broncos	Green Bay Packers	31-24
33	1998-99	Denver Broncos	Atlanta Falcons	34-19
34	1999-2000	St. Louis Rams	Tennessee Titans	23-16
35	2000-01	Baltimore Ravens	New York Giants	34-7
36	2001-02	New England Patriots	St. Louis Rams	20-17
37	2002-03	Tampa Bay Buccaneers	Oakland Raiders	48-21
38	2003-04	New England Patriots	Carolina Panthers	32-29
39	2004-05	New England Patriots	Philadelphia Eagles	24-21
40	2005-06	Pittsburgh Steelers	Seattle Seahawks	21-10
41	2006-07	Indianapolis Colts	Chicago Bears	29-17
42	2007-08	New York Giants	New England Patriots	17-14
43	2008-09	Pittsburgh Steelers	Arizona Cardinals	27-23
44	2009-10	New Orleans Saints	Indianapolis Colts	31-17
45	2010-11	Green Bay Packers	Pittsburgh Steelers	31-25
46	2011-12	New York Giants	New England Patriots	21-17
47	2012-13	Baltimore Ravens	San Francisco 49ers	34-31
48	2013-14	Seattle Seahawks	Denver Broncos	43-8
49	2014-15	New England Patriots	Seattle Seahawks	28-24
50	2015-16	Denver Broncos	Carolina Panthers	24-10

The National Football League website is www.nfl.com

The list of Canadian football champions is here