Twigg among four absentees for Hoops
Shamrock Rovers will be looking to move further ahead at the top of the table when they take on Dundalk at Oriel Park, kick-off 2pm.
The Hoops kick-off their second round of league fixtures at the county Louth venue, after finishing the first round with a 1-0 win against Galway United and on 20 points.