Hans á Lag played as a defender for HB Tórshavn in the best division of the Faroe Islands his entire football career as an adult from 1995 until 2011.

The newspaper Sosialurin mentioned in an article in September 1999 that it had been an issue several times that he might be selected for the national team, but it never happened.

[8] Hans á Lag has played some UEFA matches for HB Tórshavn.

On 13 July 2010 he played with HB Tórshavn against FC Red Bull Salzburg, which they lost 0–5.

On 13 July 2011 he played with HB Tórshavn in UEFA Champions League against Malmö FF.