MORGAN Knowles returns to Saints' 19 man squad ahead of Saints' trip to Leeds while Joe Batchelor also makes a return.
Knowles has missed the last three games after injuring a rib against London, but he returns to the 19 this week in place of Joseph Paulo who picked up a hamstring injury in the win over Warrington.
Meanwhile, Batchelor, who hasn't featured since April, also comes into the 19 in place of Louie McCarthy-Scarsbrook.
Alex Walmsley, Lachlan Coote and skipper James Roby will sit out the clash a week ahead of Saints' Challenge Cup final appearance at Wembley.
A resurgent Leeds come into the game with momentum off the back of wins over Huddersfield and Catalans.
Saints' 19 man squad:
1. Jonny Lomax, 2. Tommy Makinson, 3. Kevin Naiqama, 4. Mark Percival, 5. Regan Grace, 6. Theo Fages, 7. Danny Richardson, 10. Luke Thompson, 11. Zeb Taia, 15. Morgan Knowles, 16. Kyle Amor, 17. Dom Peyroux, 19. Matty Lees, 20. Jack Ashworth, 21. Aaron Smith, 22. James Bentley, 24. Matty Costello, 25. Joe Batchelor, 29. Jack Welsby.
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