Top 10 Lists: The Greatest Teams in Professional Football History

Here is a list of the 10 greatest teams in the history of professional football, as measured by the number of League Championships 

Here's a list of the top ten American professional football teams with the most league championships, including titles from the NFL, AFL, AAFC, WFL, and USFL:

1. **Green Bay Packers**

   - **Total Championships: 13**

     - NFL Championships: 9 (1929, 1930, 1931, 1936, 1939, 1944, 1961, 1962, 1965)

     - Super Bowl Titles: 4 (Super Bowls I, II, XXXI, XLV)

2. **Chicago Bears**

   - **Total Championships: 9**

     - NFL Championships: 8 (1921, 1932, 1933, 1940, 1941, 1943, 1946, 1963)

     - Super Bowl Titles: 1 (Super Bowl XX)

3. **Cleveland Browns**

   - **Total Championships: 8**

     - AAFC Championships: 4 (1946, 1947, 1948, 1949)

     - NFL Championships: 4 (1950, 1954, 1955, 1964)

4. **New York Giants**

   - **Total Championships: 8**

     - NFL Championships: 4 (1927, 1934, 1938, 1956)

     - Super Bowl Titles: 4 (Super Bowls XXI, XXV, XLII, XLVI)

5. **New England Patriots**

   - **Total Championships: 6**

     - Super Bowl Titles: 6 (Super Bowls XXXVI, XXXVIII, XXXIX, XLIX, LI, LIII)

6. **Pittsburgh Steelers**

   - **Total Championships: 6**

     - Super Bowl Titles: 6 (Super Bowls IX, X, XIII, XIV, XL, XLIII)

7. **San Francisco 49ers**

   - **Total Championships: 5**

     - Super Bowl Titles: 5 (Super Bowls XVI, XIX, XXIII, XXIV, XXIX)

8. **Dallas Cowboys**

   - **Total Championships: 5**

     - Super Bowl Titles: 5 (Super Bowls VI, XII, XXVII, XXVIII, XXX)

9. **Detroit Lions**

   - **Total Championships: 4**

     - NFL Championships: 4 (1935, 1952, 1953, 1957)

10. **Philadelphia Eagles**

    - **Total Championships: 4**

      - NFL Championships: 3 (1948, 1949, 1960)

      - Super Bowl Titles: 1 (Super Bowl LII)