A calf injury kept Sean out of last week's victory over Ulster, while Gordon strained an abdominal muscle during the first half of that Game.
Sean's return is Glasgow's only change in personnel from the team who started in the 34-20 win against Ulster. Andy Craig, drops out from the starting XV, though he is on the bench instead of David Millard.
Glasgow:
15 Rory Kerr
14 Sean Lamont
13 Graeme Morrison
12 Andrew Henderson
11 Kenny Logan
10 Dan Parks
9 Sam Pinder
1 Kevin Tkachuk
2 Gordon Bulloch
3 Lee Harrison
4 Andy Hall
5 Dan Turner
6 Cammy Mather
8 Jon Petrie (captain)
7 Donnie Macfadyen
Replacements:
16 Scott Lawson
17 Euan Murray
18 Andrew Wilson
19 John Beattie
20 Graeme Beveridge
21 Calvin Howarth
22 Andy Craig