Six Nations: Ireland hooker Sean Cronin out with hamstring injury

Sean Cronin has made 56 appearances for Ireland
Sean Cronin has made 56 appearances for Ireland

Ireland hooker Sean Cronin is expected to miss the Six Nations Championship because of a hamstring injury.

Cronin's club Leinster said on Monday that the 30-year-old had sustained a high-grade tear which could rule him out for 10 weeks.

The injury, sustained in Leinster's recent Pro12 win over Zebre, was initially thought to be a minor strain.

The news is a blow to Ireland as Cronin was the main cover for skipper Rory Best at hooker.

Ireland's first Six Nations match is away to Scotland on Saturday, 4 February.

"It's quite a significant hamstring injury," said Leinster coach Stuart Lancaster.

"He went to push-off and accelerate around the corner and saw it go. He is deeply disappointed but he will be back a better player."