Leinster coach Michael Cheika has made four changes to his starting XV for tomorrow night's Celtic League meeting with Connacht.
Into the pack come Keith Gleeson and Stan Wright with Shane Jennings and Stephen Knoop making way as Cheika mixes things up in an attempt to record the province's first win in the competition in over a month.
The side will again be captained by Brian O'Driscoll but with Felipe Contepomi yet to return to domestic action following the World Cup Christian Warner replaces Jonathan Sexton at outhalf and Luke Fitzgerald comes in for Rob Kearney on the wing.
Michael Bradley has made two changes to his starting Connacht
side while keeping his options open on Andrew Farley and Ray Ofisa
who remain injury concerns.
Ulster, who drew 16-16 with Leinster at Ravenhill last
weeeknd, show two changes to their starting line-up for tomorrow's
match in Glasgow.
David Humphreys starts at outhalf, with Paddy Wallace named among the replacements, after the veteran impressed coming off the bench against Leinster.
"Like every other position in the team there is a lot of competition for places and Paddy Wallace has started the last two games," explained McCall. "David did really well coming off the bench against Leinster on Friday and deserves his first start of the season."
The other main change in the starting lineup sees former Australian lock Justin Harrison partnering Ryan Caldwell in the second row with new signing Carlo Del Fava on the bench.
Leinster:G Dempsey; S Horgan, B O'Driscoll, G D'Arcy, Luke Fitzgerald; C Warner, C Whitaker; O le Roux, B Jackman, S Wright; L Cullen, M O'Kelly, S Keogh, K Gleeson, J Heaslip. Replacements: B Blaney, J F Gomez, C Jowitt, S Jennings, C Willis, J Sexton, R Kearney
Connacht:G Duffy; O Treviranus, M Deane, A Wynne, K Matthews; T Donnelly, C McPhillips; B Wilkinson, J Fogarty, R Morris; M Swift, D Gannon/A Farley (C); R Ofisa/M McCarthy, J O'Connor, J Muldoon. Replacements: A Flavin, R Loughney, D Gannon/A Farley/A Browne, R Ofisa/M McCarthy/C Rigney, C O'Loughlin, P Durcan, D Yapp.
Ulster:B Cunningham; T Bowe, A Trimble, R Dewey, M McCrea; D Humphreys, I Boss; J Fitzpatrick, R Best, B Young, J Harrison, R Caldwell, N Best, K Dawson, S Ferris. Replacements; S Philpott, D Fitzpatrick, C Del Fava, R Wilson, K Campbell, P Wallace, M Bartholomeusz
