The centre, who has featured on the wing in the last two PRO12 games, was forced off just 10 minutes into the game at the Sportsground last Friday evening and after being checked out by the Ospreys medical team has been ruled out of action.
Head Physio, Chris Towers, confirmed:
"Ben will be unavailable for the next two games and should be good for a return to action in around four weeks."
Guinness PRO12
Suite 208, Alexandra House,
The Sweepstakes
Ballsbridge, Dublin 4, Ireland
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