O'Brien to make Heineken Cup debut

Sean O'Brien has benefitted from his solid form to make his Heineken Cup debut at home to Castres Olympique at the RDS on Saturday.

O'Brien gets his chance due to an injury to Ireland international Shane Jennings. Devin Toner has beaten the claims of Trevor Hogan to start in the second row beside Mal O'Kelly.

CJ van der Linde, Luke Fitzgerald, Rob Kearney and Jasmie Heaslip return as the four changes from the side that defeated the Dragons 29-13 last weekend.

Ticket sales for this Saturday's Heineken Cup clash against Castres Olympique have broken the 16,000 barrier.

LEINSTER (v Castres):

15: Girvan Dempsey

14: Shane Horgan

13: Brian O'Driscoll

12: Luke Fitzgerald

11: Rob Kearney

10: Jonathan Sexton

9: Chris Whitaker CAPTAIN

1: Stan Wright

2: Bernard Jackman

3: CJ van der Linde

4: Devin Toner

5: Malcolm O'Kelly

6: Rocky Elsom

7: Sean O'Brien

8: Jamie Heaslip

REPLACEMENTS:

16: Brian Blaney

17: Cian Healy

18: Trevor Hogan

19: Stephen Keogh

20: Chris Keane

21: David Holwell

22: Simon Keogh