Exeter prop Craig Mitchell is set for a lengthy spell on the sidelines through injury, Chiefs head coach Rob Baxter has confirmed.
The 27-year-old Wales international picked up an injury to his pectoral muscle when he came on as a replacement during a Premiership A League match.
"Mitch is looking like a pretty long-term injury and we haven't finalised the exact issue," said Baxter.
"He is likely to require an operation on his shoulder/pec area."
Neath-born Mitchell, who signed for Exeter from Ospreys in 2011, has represented his country on 15 occasions.
The Chiefs are also still missing James Hanks, Luke Arscott, Greg Bateman and Jack Nowell through injury.