What year was the NFL officially formed and named as such?
1922
1922
1922
1922
1920
1922
1920
1922
1920
1920
1922
1920
1922
1920
1922
1920
1920
1922
1920
1922
1920
1922
1920
1920
1922
1920
1921
1922
1920
1921
1922
1920
1920
1921
1922
1920
1921
1922
1920
1921
1922
1920
1920
1921
1922
1921
1922
1921
1922
1926
1921
1926
1930
1921
1926
1930
1923
1930
1921
1926
1923
1930
1921
1926
1923
1930
1903
1921
1926
1930
1923
1903
1930
1921
1926
1923
1903
1930
1921
1926
1923
1930
1903
1946
1921
1926
1930
1923
1903
1946
1930
1912
1921
1926
1946
1923
1903
1924
1930
1912
1946
1921
1926
1923
1930
1903
1922.
1924
1946
1912
1921
1926
1930
1915
1923
1903
1946
1924
1930
1912
1921
1926
1915
1946
1923
1903
1889
1924
1930
1922.
1912
1946
1926
1927
1915
1925
1923
1930
1903
1889
1924
1946
1876
1925
1912
1926
1927
1930
1915
1923
1932
1933
1903
1889
1946
1924
1922.
1925
1876
1930
1912
1926
1933
1915
1929
1946
1923
1903
1925
1889
1927
1924
1930
1876
1932
1933
1929
1912
1946
1926
1915
1922.
1925
1923
1903
1889
1924
1933
1929
1946
1876
1925
1912
1926
1915
1923
1933
1929
1903
1889
1946