What league does the team Billy Houghton made 51 appearances for play in?
Billy Houghton:  During his career he made over 200 appearances for Barnsley, 139 appearances for Rotherham United, over 100 appearances Ipswich Town and 51 appearances for Watford. Watford F.C.: Watford Football Club is a professional football club based in Watford, Hertfordshire, England, that plays in the Premier League, the highest level in the English football league system.
the Premier League