Forwards Aaron Jarvis and Harrison Keddie have both been ruled out for the start of the new season for the Dragons after suffering bicep injuries in training.
Both players have undergone operations and have begun their rehabilitation with an expected return to training in October.
For Jarvis this is a cruel setback after he only joined the PRO14 outfit ahead of this season from Top 14 giants Clermont.
Keddie meanwhile continues to suffer from poor luck with injuries as he missed a spell of 2017/18 with a shoulder issue.