Uncapped Glasgow pair Scott Cummings and Kyle Steyn have beaten experienced campaigners such as Richie Gray to the final two places in Scotland's World Cup training squad.
Gregor Townsend left two spaces open - for a second-rower and a winger - when he named a 42-man squad three weeks ago.
And 22-year-old lock Cummings and versatile back Steyn, who can play at centre or out wide, have won the race after a strong finish to the season, which culminated in a narrow Guinness PRO14 final defeat by Leinster on Saturday.
That means no spot for Gray, who won the last of his 65 caps against Italy last year before back and hip injuries ruled him out for the best part of a year.
The former Glasgow player is back to full fitness but has only made six starts for Toulouse this season and has not featured enough in recent weeks to force his way into Townsend's plans.
Townsend said: "We are fortunate to have a number of very good second-rows available to us right now. With Richie Gray, Tim Swinson and Andrew Davidson also in contention for this remaining place in our World Cup squad, Scott's selection is a testament to how well he has performed throughout the season and in particular over the past few weeks.
"Scott has played very well in some crucial games for Glasgow and has really taken his game to the opposition. He was impressive in his ball carrying, defence and his all-round work-rate on Saturday against Leinster and we look forward to working with him and the other four second-rows in our squad."