Rory Best will be ruled out for several weeks after suffering a fractured arm during Ireland's nait-biting clash against the All Blacks.
The injury is the latest to hit Ulster, alongside with the following others, the side announced today.
Iain Henderson suffered a hamstring injury in Ulster's victory over Edinburgh on Friday. He will have an MRI scan this afternoon to determine the extent of the injury.
Lewis Stevenson sustained medial ligament damage in his right knee against Edinburgh. He will be out for up to six weeks.
Michael Allen suffered concussion in the Edinburgh game. He will follow the normal return-to-play protocols.
Ian Porter irritated his AC joint ahead of the Edinburgh game and is expected to be unavailable for two weeks.
Nick Williams suffered a calf injury ahead of the match against Edinburgh. He will be out for between four and six weeks