Fraser James Macgregor Brown made his Scotland debut as an injury replacement on Scotland's 2013 summer tour to South Africa (defeating Italy in the quadrangular tournament), a few short months after representing the Scotland Club XV team in Bourgoin-Jallieu, against their French counterparts.
His first Scotland appearance at BT Murrayfield came in the second-half of the 2014 viagogo Autumn Test against New Zealand before making his RBS 6 Nations debut against France in Paris, and went on to feature as a replacement in every match of the championship.
Fraser led Scotland under-20 to an 18-17 victory against Wales at McDiarmid Park, Perth, on the opening day of the 2009 6 Nations, but because of injury in that match he missed the age group's other matches in that programme.
He returned to the under-20 squad for the IRB Junior World Championship in Japan in May that year, captaining the Scots against Samoa and Japan.
Fraser was Merchiston Castle School captain in 2006/07 and played for Scotland in the Six Nations’ under-18 festival in the Glasgow area in April that season.
He made his under-20 international debut in February 2008, playing as a replacement in the Falkirk match in which Scotland opened their campaign in the age group’s 6 Nations, and his first start followed against England at Falkirk in March: he played in all five matches in that championship, starting in two.
He signed with Glasgow Warriors in the 2013/14 season, having returned to rugby with Heriot's after a period out of the game through injury.