Winger Liam Bibo and flanker Ray Ofisa have recovered from a hamstring injury and vertigo respectively to take their places in the 22-man panel.
Young forwards David Nolan, Dermot Murphy and Conor Higgins are set to get a chance to impress against the Scarlets, while Ireland Under-20 duo Tiernan O'Halloran and Eoin Griffin and current Ireland Under-19 international Eoin McKeon have also been included.
Game-time on Sunday for Nolan, O'Halloran and promising back rower McKeon would see them make their Magners League debuts.
CONNACHT Squad (v Scarlets) - Backs (10): Liam Bibo, Kieran Campbell, Eoin Griffin, Ian Keatley, Troy Nathan, Miah Nikora, Tiernan O'Halloran, Conor O'Loughlin, Brian Tuohy, Aidan Wynne.
Forwards (12): Andrew Browne, Adrian Flavin, Conor Higgins, Ronan Loughney, Mike McComish, Eoin McKeon, Robbie Morris, Dermot Murphy, David Nolan, Johnny O'Connor, Ray Ofisa, Bernie Upton.