Jackson will yield to Wilson for milestone
However, the honour of leading the side out will fall to number eight Roger Wilson, who will make his 200th appearance for the Province.
He becomes the second player in Ulster to reach 200 caps - Andrew Trimble holding the all time record of 202.
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Hide AdWilson and Jackson are two of seven changes to the Ulster starting team which defeated Glasgow 13-10 to keep them top of the table, a point ahead of fourth placed Scarlets.
Ruan Pienaar and Ian Humphreys, who went through concussion protcols this week, are named on the bench.
With Rob Herring ruled out with injury, Ulster have handed a first competitive start to rookie, John Andrew at hooker and the replacement, Jonny Murphy, would make his senior competitive debut if called upon.
SUNDAY’S TEAMS:
ULSTER: S Olding, C Gilroy, D Cave, L Marshall, J Stockdale, P Jackson (capt), P Marshall; A Warwick, J Andrew, R Lutton, A O’Connor, F van der Merwe, R Diack, C Henry, R Wilson.
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Hide AdReplacements: J Murphy, K McCall, B Ross, P Browne, C Ross, R Pienaar, I Humphreys, S Arnold.
Scarlets: M Collins, G Owen, R King, H Parkes (capt), DTH van der Merwe, A Thomas, A Davies, P John, K Myhill, P Edwards, G Earle, D Bulbring, A Shingler, W Boyde, M Allen.
Replacements: R Elias, D Evans, R Jones, M Paulino, R Pitman, R Williams, D Jones, S Evans.