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 headed the NASL from 1969 to 1982. He is considered a crucial contributor to the league's development and was instrumental in boosting its profile through TV agreements with CBS and ABC. Woosnam played a pivotal role in convincing Warner Communications executives to back an expansion team, the New York Cosmos, in 1970.