Career
Johnston made his Super League debut for Castleford Tigers against London Broncos in 2012. In 2014, Ben was a late call-up to Mark Aston"s Ireland national rugby league team"s squad for the 2014 European Cup tournament. Ben played in 2 of the 3 games available.
In October and November 2015, he appeared for Ireland again in the following year"s European Cup competition.
