Outhalf James McKinney and prop forward, Adam Macklin, are set to face Ulster in next season’s British & Irish Cup pool stages.
The duo have joined Rotherham Titans this summer - McKinney returing to the England Championship side after a one-year return to Ulster.
Another former player, Ali Birch is also at Titans.
Ulster Ravens are drawn in Pool Two with Rotherham, Leeds Carnegie (last year’s beaten finalists) and one of four Welsh qualifiers, yet to be confirmed.
Former Ulster player, David McIlwaine is with the Leeds team.
The competition, now in its sixth season, has a new structure since the withdrawal of the Scottish clubs.
It is now played across five pools, each with four teams. The group winners and three best runners up will go forward to the quarter-finals.
Ulster Ravens have never shown strongly in the competition since the inaugural year, when they reached the quarter-finals.
Leinster ‘A’ are the current holders having won the competition in back-to-back seasons.
Ulster Ravens fixtures: Weekend of October 11, A v Wales 4; October 18, H v Leeds Carnegie. October 25, A (TBC) v Rotherham; November 29, H (TBC) v Rotherham. December 6, A v Leeds; December 13, H v Wales 4.
Quarter-finals: January 24; Semi-finals: March 14; Final: April 4.
Pool 1: London Scottish, Wales 2, Bristol, Connacht.
Pool 2: Rotherham Titans, Leeds Carnegie, Ulster Ravens, Wales 4.
Pool 3: Worcester, Nottingham, Mosseley, Munster ‘A’.
Pool 4: Wales 1, Cornish Pirates, Doncaster Knights, Bedford Blues.
Pool 5: Leinster ‘A’, Plymouth Albion, Wales 3, Jersey.