Plymouth Albion are set to be without their captain Sean-Michael Stephen for up to eight weeks.
The Canadian international flanker broke his hand in the opening minutes of the 16-20 loss to the Cornish Pirates on Saturday.
"We're waiting to see if he needs an operation," Albion chairman of rugby Graham Dawe told BBC South West.
Stephen has started four matches this season and scored a try against Esher on the opening day.
The 28-year-old had only returned to the side from a back injury last month.
"He's could be out for up to eight weeks," Dawe added.
But Dawe has some positive news with Stephen's fellow Canadian internationals Tyler Hotson and Aaron Carpenter due back from the World Cup this month.
The pair are set to return to the Brickfields in time for the Championship match with London Scottish on 15 October.