Glamorgan will be without leading seamer James Harris because of a sore foot for Tuesday's Championship match against Surrey at the Oval.
Harris is likely to be replaced by Chris Ashling in the XI, while rookie paceman Alex Jones is added to the squad following the win over Middlesex.
Dean Cosker and Harris are Glamorgan's joint leading wicket-takers with 26 in five Championship matches.
All-rounder Jim Allenby still is not judged fully fit after a side strain.
Glamorgan have a sequence of three Championship Division Two matches away from home in 14 days and had signalled they were likely to make bowling changes during that period.