It will be only a third Scotland appearance for the Glasgow centre.
Stafford McDowall revealed his shock at being told he would be Scotland co-captain for the first time in the summer tour opener against Canada on Saturday.
The 26-year-old Glasgow Warriors centre was asked by Gregor Townsend to lead the side along with Edinburgh flanker Luke Crosbie for the game at TD Place Stadium, Ottawa, where five players will make their debuts with five other uncapped players on the bench.
It will be only a third Scotland appearance for McDowall, who won his first cap  in a World Cup warm-up game against ...