Willie Faloon has returned to Ulster after three years at interprovincial rivals Connacht.
Connacht Rugby has announced the signing of Ireland qualified Api Pewhairangi.
European Challenge Cup holders Gloucester will face local rivals Worcester Warriors in the 2015-16 competition.
Gloucester will take on Bordeaux Bègles for a place in next year's Champions Cup after they beat Connacht 40-32.
The Ospreys beat Connacht 24-20 but could not record a bonus point for a home PRO12 play-off.
Connacht their hopes of European Champions Cup qualification alive with a 40-10 bonus point win over Zebre.
With one round remaining and the top four sides split by a point there is still everything to play for in the PRO12.
Stuart Barnes says that players should not be banned for accidental acts after Iain Henderson was red-carded for Ulster.
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