Looking ahead to tomorrow night's game, head coach Steve Bates said: "The team took some positive steps forward last week towards playing an exciting brand of rugby.
"Tomorrow night's game will be a very good indicator for the rest of October and it will be important for us to perform extremely well against one of the strongest teams in Europe."
Nick De Luca moves to the left wing which means that National Academy (Borders) winger Mark Robertson has been made available to play for his club, Melrose, who are at home to Hawick (kick-off 3pm).
New signing Ed Kalman makes his first start since joining the Reivers over the summer and Bruce Douglas moves to the bench.
Border Reivers team to play Leinster in the Magners League at Netherdale on Friday 13 October (kick-off 7:30pm)
15 Calum MacRae *
14 Simon Danielli
13 Ben MacDougall
12 Garry Law
11 Nick De Luca *
10 Steve Jones
9 Chris Cusiter * CAPTAIN
1 Gavin Kerr
2 Ross Ford *
3 Ed Kalman
4 Opeta Palepoi
5 Craig Hamilton
6 Ross Beattie
8 Kelly Brown *
7 Scott Gray
Substitutes
16 Steve Scott
17 Bruce Douglas
18 Scott Newlands
19 John Dalziel
20 Brendan McKerchar
21 Andy Miller
22 Gregor Townsend