Edinburgh stand-off Gregor Hunter could miss the rest of the season after suffering a serious knee injury.
Hunter damaged his anterior cruciate ligament while appearing for Hawick against Glasgow Hawks in the Premiership last month.
The 21-year-old from Galashiels face a nine-month lay-off following surgery.
Harry Leonard played at stand-off in Friday's 16-13 win over Dragons.
Edinburgh head coach Alan Solomons also has Scotland international Greig Laidlaw and Piers Francis as options for the position.