nfl baseball

Throughout its history, the National Football League and other leagues have used several different formats to determine their league champion, including a period of interleague match-ups determining a true world champion.
The NFL first determined champions through end-of-season standings, but switched over to a playoff system in 1933. The rival All-America Football Conference and American Football League, which have since merged with the NFL (some AAFC teams in 1950 and all ten AFL teams in 1970 respectively), began using the playoff system since the creation of their respective leagues.
From 1966–1969 prior to the AFL-NFL merger, the NFL and the AFL held a "world championship" game. The game was first called the AFL-NFL World Championship Game later renamed the Super Bowl. The Green Bay Packers won the most of these World Championship Games with two victories.
Since 1970, the modern era NFL has become the only major professional football league in the United States, and its current league championship game is called the Super Bowl. The Dallas Cowboys, Pittsburgh Steelers, and San Francisco 49ers have all won five Super Bowls. However, all three franchises trail the Packers in the number of overall NFL league titles, twelve. The current defending champion of the NFL is the New York Giants who won Super Bowl XLII over the New England Patriots.
At its inception in 1920, the NFL had no playoff system or championship game. The champion was the team with the best record during the season, determined by winning percentage, with ties omitted. This sometimes led to very odd results, as teams played anywhere from eight to twenty league games in a season, and not all teams played the same number of games.
There were at least two controversial championships during this era. The first was in the 1921 NFL season, between the Buffalo All-Americans and the Chicago Staleys. Buffalo had insisted that the last matchup between the two was an exhibition match not to be counted toward the standings; however, Chicago owner George Halas, as well as league management, insisted the game be counted in its standings (the league, at the time, did not recognize exhibition matches). The result was that although the two teams were effectively tied in the standings, the disputed game, having been played later, was given more weight and thus ended up being considered a de facto championship game. (Chicago also had one less tie game.) The second disputed title was the 1925 NFL Championship controversy between the Pottsville Maroons and the Chicago Cardinals. The Maroons had been controversially suspended by the league at the end of the 1925 NFL season for an unauthorized game against a non-NFL team, allowing the Cardinals to throw together two fairly easy matches (one against a team comprised partly of high school players, also against league rules) to pass Pottsville in the standings. The league awarded the Cardinals the title, one of only two in the team's history, in a decision that continues to be disputed to this day, with Cardinals owners opposing any change in the record and the two current Pennsylvania teams in favor. No action has been taken by the league itself to address the issue, although a self-made championship trophy from the Maroons sits in the Pro Football Hall of Fame.
In the 1932 season, the Chicago Bears and the Portsmouth Spartans tied with the best regular-season winning percentages (although the Green Bay Packers had four more wins).
To determine the champion, the league voted to hold the first official playoff game in Chicago at Wrigley Field. Because of severe winter conditions before the game, and fear of low turnout, the game was held indoors at Chicago Stadium which forced some temporary rule changes.
The game was played on a modified 80-yard dirt field, and Chicago won 9-0, winning the league championship. The playoff game proved so popular that the league reorganized into two divisions for the 1933 season, with the winners advancing to a scheduled championship game.
A number of new rule changes were instituted, many inspired by the 1932 indoor championship game: the goal posts were moved forward to the goal line, every play started from between the hash marks, and forward passes could originate from anywhere behind the line of scrimmage (instead of five yards behind).
Starting in 1933, the NFL decided its champion through a single postseason playoff game, called the NFL Championship Game. During this period, the league divided its teams into two groups, through 1949 as divisions and from 1950 onward as conferences.
Divisions (1933–1949): Eastern and Western Conferences (1950–1952): American and National Conferences (1953–1966): Eastern and Western Conferences and Divisions (1966–1969): Eastern (Capitol and Century) and Western (Central and Coastal) The home team for the NFL Championship Game was determined by a yearly rotation between the conferences (or divisions), not by regular-season records. If there was a tie for first place within the conference, an extra playoff game determined which team played in the NFL Championship Game. (This occurred nine times in these 34 seasons: 1941, 1943, 1947, 1950 (both conferences), 1952, 1957, 1958, and 1965.)
This last occurred during the 1965 season, when the Green Bay Packers and Baltimore Colts tied for first place in the Western Conference at 10-3-1. Green Bay had won both its games with Baltimore during the regular season, but because no tie-breaker system was in place, a conference playoff game was held on December 26 (the scheduled date for the NFL championship game). The Cleveland Browns, the Eastern champion at 11-3-0, did not play this week. The playoff pushed the championship game to January 2, 1966, the first time the NFL champion was crowned in January. Green Bay won both post-season games at home, beating the injury-riddled Colts (with third-string QB Tom Matte) in overtime by a field goal, and taking the title 23-12 on a very muddy field (in Jim Brown's final NFL game).
For the 1960 through 1969 seasons, to compete with the rival American Football League's championship games, the NFL staged an additional postseason game called the "Playoff Bowl" (aka the "Bert Bell Benefit Bowl" or the "Runner-up Bowl"). These games matched the second-place teams from the two conferences; the CBS television network advertised them as "playoff games for third place in the NFL." All ten of these consolation games were played in the Orange Bowl in Miami in January, the week after the NFL championship game. The NFL now classifies these contests as exhibition games and does not include the records, participants, or results in the official league playoff statistics. The Playoff Bowl was discontinued after the AFL-NFL merger; the final edition was played in January 1970.
Starting with the 1934 game the winning team received the Ed Thorp Memorial Trophy. The trophy was named after Ed Thorp, a noted referee, rules expert, sporting goods dealer. Thorp died in 1934 and a large, traveling trophy was made that year, passed along from champion to champion each season with each championship team's name inscribed on it. Teams would also receive a replica trophy. The trophy was last awarded to the Minnesota Vikings in 1969. The actual trophy however is now missingThe All-America Football Conference was created in June of 1944 to compete against the NFL. Even though the league outdrew the NFL in attendance, the continuing dominance of the Cleveland Browns led to the league's downfall.
For its four seasons, the league was divided into two divisions: Eastern and Western (1946–1948) and a single division in 1949. The site of the championship game just as in the NFL was determined by divisional rotation except for 1949 when the remaining teams with the best record hosted the game.
The Browns behind the guiding of Otto Graham won all four of the league championship games. A playoff game was played in 1948 to break a tie between the Baltimore Colts and Buffalo Bills (AAFC) and in 1949 to set up a championship game between the Browns and the San Francisco 49ers.
In 1948, the Browns became the first professional football team to complete an entire season undefeated and untied — 24 years before the 1972 Miami Dolphins of the NFL would accomplish the task, but this feat is not recognized by NFL record books. Unlike the AFL statistics which are treated as NFL statistics, records of the AAFC and its teams (most of which folded) are not recognized. However, individual AAFC player statistics are included in Pro Football Hall of Fame records, and the defunct conference is memorialized in the Hall.