Meanwhile, former Blues front-rower Tom McCartney has moved a step closer to playing test rugby for Ireland by signing a new three-year deal at Connacht.
The 31-year-old will qualify for Ireland on residency grounds in November next year and could yet force his way into head coach Joe Schmidt's plans.
McCartney's new deal also provides a shot in the arm for Connacht, who will lose head coach Pat Lam, formerly in charge of the Blues, to Bristol at the end of the season.
McCartney joined Connacht in 2014 following seven seasons at the Blues in which he filled in at prop on occasions.
He tallied 100 NPC games between stints at North Harbour and Auckland.