4. Joe Launchbury
The Wasps captain left the field early on his 150th appearance for the club as they breezed past Bristol Bears at the Ricoh Arena in early September. Early signs were that it could be a pretty bad calf injury with James Gaskell replacing him. If it does prove to be serious, that would leave Jones without Launchbury and George Kruis after the Saracens star made his move to Japan.
