Wales lock Luke Charteris has joined Dragons captain Tom Willis on the injury list ahead of Glasgow's Magners League visit to Newport.
The acting skipper could be out for two games with blurred vision after taking a ball in the eye in the defeat to Leinster.
Danny Lee could be in line for his debut, the scrum-half a last-minute hamstring injury withdrawal in Dublin.
Joe Bearman, Matthew Watkins, Hoani MacDonald and Ben Castle are also on the casualty list.
The latter three hope to be fit for the Munster game on September 27, but Willis (calf) is expected to be out for the rest of the month.