Sean O'Brien faces lengthy layoff

Leinster will be without flanker Sean O'Brien for the next five to six months.



Leinster boss Matt O'Connor has revealed the British and Irish Lions flanker will undergo shoulder surgery in London on Friday.

O'Brien has suffered an infection in the same shoulder he had reconstructed after Ireland's 24-22 defeat to New Zealand in Dublin in November.



O'Brien will be central to Ireland boss Joe Schmidt's World Cup 2015 plans, but now faces another setback just as he was eyeing his international return.

O'Brien made his long-awaited Leinster return in the Guinness PRO12 clash with Glasg…