Vern Cotter's first Scotland selection surprised even some of the 43 players who were chosen for the summer tour of the Americas and South Africa.
Glasgow hooker Kevin Bryce – who has only made two substitutes appearances in professional rugby – was among six uncapped players named across two separate squads for the North American and Southern Hemisphere legs of the June schedule.
Bryce's fellow Warriors forwards Gordon Reid and Alex Allan were named along with fly-half Finn Russell while London Irish flanker Blair Cowan and Edinburgh scrum-half Grayson Hart complete the group aiming to make their debuts.
There was no place for Glasgow captain Al Kellock or prop Euan Murray.
The nine players who will play a full part in the tour, which sees Scotland face the United States, Canada, Argentina and South Africa, are Reid, Pat MacArthur, Bryce, Moray Low, Geoff Cross, Grant Gilchrist and backs Alex Dunbar, Sean Maitland and Stuart Hogg.
Bryce spent most of the season playing for Heriot's but is signed up for Glasgow for the next two seasons.
The 25-year-old said of his call-up: "I was over the moon and gobsmacked at the same time. I've hardly played any professional rugby so it was a shock.
"I never had any hope, I was just minding my business and training hard with Glasgow, but then I got the call. My last game was for Caley Reds against Newcastle Falcons about two weeks ago. If you had told me after that that I would be in the Scotland squad I would have said you are having a laugh."
Russell has also had a meteoric rise – although his call-up came after he played a role in Glasgow's RaboDirect PRO12 semi-final win over Munster.
"You definitely start to think about it when you get regular games for Glasgow but it's hard to believe," the 21-year-old said.
"It has been a whirlwind... it was surreal getting the call and it's still not really sunk in yet."