Finegan, 34, only joined the Falcons last year after a successful spell with Australia and the ACT Brumbies.
BBC: SPORT | Rugby Union | English | Newcastle axe Walder and Finegan
2.
But Owen Finegan (ankle) and David Lyons (thigh) are expected to be fit to face the Irish after sitting out the game against the Pumas.
BBC: Aussies recall Cannon
3.
Finegan, a World Cup winning flanker with Australia in 1999, was one of Newcastle's high profile signings last summer and was brought in to help improve their mid-table finish.
BBC: SPORT | Rugby Union | English | Newcastle axe Walder and Finegan