Joseph out for three months
The 24-year-old underwent surgery this week to repair damage to his pectoral muscle and he is now a doubt for the start of the Six Nations tournament, Bath said.
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Joseph was injured in England's opening World Cup win agains Fiji, missed the defeat by Wales but returned in the loss to Australia that consigned England to their humiliation of failing to reach the quarterfinals.
"Joseph, who made his 16th international appearance for England during the competition, will be out of action for approximately three months," Bath said.
England open their Six Nations against Scotland at Murrayfield on February 6.
Agence France-Presse