The Argentinian outhalf suffered the damage while playing for Carlow against Shannon.

Morrissey was playing for his club O'Toole's in a challenge match when he suffered the damage.

There was less than a minute left when Blaney suffered the damage in a Heineken Cup match between Bristol and Harlequins last December.

The Ireland flanker suffered the damage in a training session in Durban on Monday complaining of soreness in the joint and was withdrawn.