The young stand-off received a cut to his right thigh in Glasgow's win over Connacht on the opening weekend of the PRO14 campaign.
Hawks include Kiran McDonald, Matt Fagerson, George Horne, Robert Beattie and Sam Yawayawa.
Marr host local rivals Ayr and include Greg Peterson and Kaleem Barreto in their starting XV. George Stokes starts for Ayr with Ryan Grant and Robbie Nairn on the bench.
Stirling County include Hamilton Burr and Lewis Wynne for the top-of-the-table clash with Melrose at Bridgehaugh.