William Terrence Hennessey (born 1 September 1942) is a Welsh former international footballer who gained 39 caps for Wales.
He played as a defender and made 400 Football League appearances in the 1960s and 1970s with Birmingham City, Nottingham Forest and Derby County.
During his career Hennessey accumulated a total of 400 league appearances, as well as being capped by Wales on 39 occasions.
After taking a position (for the second time) as an assistant coach of Tulsa Roughnecks in 1980,[5] he took over as manager mid-season in 1981, replacing Charlie Mitchell.
[6][7] In 1983 Hennessey led Tulsa to the NASL championship, winning Soccer Bowl '83 by a 2–0 score over Toronto Blizzard.