O'Driscoll had been suffering with a knee injury, while Kearney was previously sidelined with a back problem.
Leinster: R Kearney; McFadden; O'Driscoll; G D'Arcy; Nacewa; Sexton; Reddan; Healy; Strauss; Ross; Cullen; Thorn; McLaughlin; O'Brien; Heaslip
Replacements: Cronin; Van der Merwe; White; Toner; Jennings; Boss; Madigan; D Kearney
Ulster: Terblanche; Trimble; Cave; Wallace; Gilroy; Jackson; Pienaar; Court; Best; Afoa; Muller; Tuohy; Ferris; Henry; Wannenburg
Replacements: Brady; McAllister; Fitzpatrick; Stevenson; Faloon; Marshall ; Humphreys; A D'Arcy