The 20-year-old striker has come into the side at the expense of Kenny Miller, who has dropped down to the bench.
Also among the substitutes is attacker Nicky Clark following his recovery from injury.
Meanwhile, the home side's attack will be spearheaded by Denny Johnstone, who is on loan from English Championship side Birmingham City.
Greenock Morton: Gaston; Kilday, O'Ware, Lamie, Pepper; Tidser, Miller, Forbes, Barr; Johnstone, Samuel
Subs: Adam, McKee, MacDonald, McCluskey, Scullion, Russell, Sabajo
Rangers: Foderingham; Tavernier, Kiernan, Wilson, Wallace; Halliday, Holt, Zelalem; McKay, Waghorn, Oduwa
Subs: Kelly, Ball, Law, Shiels, Clark, Miller, Aird