Probably 2011, when the NFL season started before the end of the MLB season.
First of all, you are confusing the terms national league and American league used in baseball with football. Replace the word league with football. NFL has the National Football Conference and American Football Conference. There really is no difference, the difference is very similar to the differences between the American League and National League in baseball. Both Conferences are at the same level of play, play for the world championship with one team represting each (league in baseball, conference in football) in the final round of the playoffs, and in both baseball and football, each team plays the majority of games in their own (league in baseball, conference in football), but still plays a few of their games against teams from the other league or conference. These conferences were created after the NFL merged with a competing top-level league in 1970, the AFL (American Football League). All teams in the NFC are either expansion teams created after the merger, or were in the NFL before the merger. In the AFC, three teams that were in the NFL moved to the AFC the year of the merger so both conferences would have the same number of teams. Other than those three teams, all AFC teams were in the AFL or are expansion teams created after the merger.
The Oakland Raiders joined the National Football League after the merger of the National Football League and American Football League in 1970.
The NFL and AFL merged in 1970.
1916
No, Both American and National league baseball games are 9 innings long
Sports teams that start with the letter R:Raiders - Oakland Raiders (National Football League)Rams - Saint Louis Rams (National Football League)Rangers - New York Rangers (National Hockey League)Rangers - Texas Rangers (Major League Baseball)Raptors - Toronto Raptors (National Basketball Association)Ravens - Baltimore Ravens (National Football League)Rays - Tampa Bay Rays (Major League Baseball)Red Sox - Boston Red Sox (Major League Baseball)Red Wings - Detroit Red Wings (National Hockey League)Reds - Cincinnati Reds (Major League Baseball)Redskins - Washington Redskins (National Football League)Rockets - Houston Rockets (National Basketball Association)Rockies - Colorado Rockies (Major League Baseball)Roughriders - Saskatchewan Roughriders (Canadian Football League)Royals - Kansas City Royals (Major League Baseball)
NFL is an American football abbreviation. "NFL" stands for "National Football League". National because the league is played across the nation; Football because the game played is referred to as "football" (It is known as "football" in America. Many countries refer to it a "soccer".); League because this national game is played with multiple teams in many places at different times, etc. (unapproved definition of "league").
The Texans are a National Football League team, not a baseball club.
The state's major professional sporting teams include: Cincinnati Reds (Major League Baseball), Cleveland Indians (Major League Baseball),Cincinnati Bengals (National Football League) Cleveland Browns (National Football League),Cleveland Cavaliers (National Basketball Association),Columbus Blue Jackets (National Hockey League),and the Columbus Crew (Major League Soccer)
Falcons, Atlanta (National Football League)Florida Panthers (National Hockey League)Florida Marlins (major league baseball)
You can find it at the National Football League website @ NFL.com.
National Indoor Football League ended in 2008.
National Indoor Football League was created in 2001.
Newman National Football League was created in 1972.
National Football League was created on 1920-08-20.
Fortescue National Football League was created in 1956.
The National Football League was founded in 1920 under the name American Professional Football Association. The name was changed to National Football League in 1922.