Woosnam was Commissioner of the NASL from 1969 to 1982. He is credited as an important factor in the development of the NASL, and had been a major figure in promoting the league and had secured TV contracts from CBS and ABC. He played a key role during 1970 in recruiting executives at Warner Communications to invest in an expansion team—the New York Cosmos.
Woosnam's tenure as NASL Commissioner from 1969 to 1982 was marked by his efforts to promote the league and secure TV deals with major networks. His key role in recruiting executives at Warner Communications to invest in an expansion team, the New York Cosmos, in 1970, had a lasting impact on the league's development.