[8] During his time with the Dons, Clark played some games as a defender, including against Rangers at Ibrox Park, after losing his place in goal to Ernie McGarr.

[8] In autumn 1984 he once more came out of retirement to keep goal for Forres Mechanics in a 1–0 victory over Buckie Thistle in the Highland League Cup Final held at Elgin.

[12] Fraser Forster broke the Scottish league record in 2014 and was congratulated by Clark after the match in which it was surpassed.

[8] Clark coached Highlanders F.C., Bulawayo (1983–84), Dartmouth College (1985–93), the New Zealand national football team (1994–96),[14] Stanford University (1996–2000) and the University of Notre Dame men's soccer team (2001–2017), winning the national title in 2013 with the Irish.

His son Tommy, a paediatrician, is the founder and executive director of the HIV prevention organisation Grassroot Soccer.