The NCAA Division I Wrestling Championships for wrestling individuals and teams have been held annually since 1928 (with official sponsorship in all years but 1929 and 1931–33), except for a hiatus in 1943–45 during World War II. In 1928 and from 1931 to 1933, there was only an unofficial title. Oklahoma A&M (now Oklahoma State) won the 1928 and 1931 unofficial titles. Indiana University won the 1932 unofficial title, and in 1933, Iowa State and Oklahoma A&M were unofficial co-champions.