Glasgow senior academy players Alex Bryden and Aidan Cross start for Marr in the derby meeting with Ayr at Fullarton Park.
Richie Simpson is at stand-off for Ayr.
Rory Purvis is on the bench for Edinburgh Accies who host Glasgow Hawks at Raeburn Place. Scrum-half Brent Jackson starts for Hawks.
Currie take on Watsonians at Malleny Park this evening with Glasgow winger Kerr Johnston on the bench for the hosts.