Get team news, head-to-head statistics and more ahead of the latest Betfred Super League action.
Saturday, May 19
Castleford (5) v Leeds (6)
Castleford have forward Nathan Massey back from injury while winger Kieran Gill is in line to make his second Super League appearance after recovering from a knee injury sustained on his debut last June.
Leeds have winger Ryan Hall and back-row forward Brett Delaney back from injury but prop forward Anthony Mullally starts a two-match ban.
Last season: Leeds 12 Castleford 23, Castleford 29 Leeds 18, Castleford 66 Leeds 10.
Last six league matches: Castleford L W W L W L Leeds W W L L W L.
Top try scorers: Paul McShane (Castleford) 6; Ash Handley (Leeds) 8.
Top goal scorers: Luke Gale (Castleford) 35; Kallum Watkins (Leeds) 33.
Referee: C Kendall.
Widnes (10) v St Helens (1)
Widnes welcome back co-captain Joe Mellor, utility back Danny Craven and winger Patrick Ah Van from injury while centre Jimmy Keinhorst returns after being unable to play against his parent club Leeds in the Cup.
St Helens coach Justin Holbrook brings in back row forward Matty Lees following the completion of a two-match ban in place of front rower Kyle Amor, who has received a one-match ban.
Last season: St Helens 26 Widnes 10, Widnes 16 St Helens 14.
Last six league matches: Widnes L L L L L L St Helens W W L W W W.
Top try scorers: Krisnan Inu (Widnes) 6; Ben Barba (St Helens) 15.
Top goal scorers: Tom Gilmore (Widnes) 28; Danny Richardson (St Helens) 70.
Referee: L Moore.
Wigan (2) v Warrington (3)
Wigan are without skipper Sean O'Loughlin, who has a calf injury, but are set to welcome back stand-off George Williams, who missed the cup win at Hull KR with a calf problem. Full-back Morgan Escare is also recalled.
Warrington coach Steve Price has named an unchanged squad for the third week in a row as they look for an 11th successive win. Second rower Ben Currie is their only injury absentee.
Last season: Wigan 10 Warrington 16, Wigan 24 Warrington 24, Warrington 16 Wigan 38.
Last six league matches: Wigan W W W W W W Warrington W W W W W W.
Top try scorers: Oliver Gildart & Liam Marshall (Wigan) 9; Tom Lineham (Warrington) 8.
Top goal scorers: Sam Tomkins (Wigan) 43; Stefan Ratchford (Warrington) 25.
Referee: R Hicks.
Sunday, May 20
Hull KR (11) v Hull (4)
Prop Robbie Mulhern has joined Hull KR's injury list but forwards Ben Kavanagh and Chris Clarkson are fit again and hooker Aaron Smith is recalled, while young winger Elliot Wallis keeps his place after making his debut in the cup defeat by Wigan.
Without eight senior players through injury and suspension, Hull will put scrum-half Liam Harris straight in against his old club following his arrival from Doncaster and centre Cameron Scott could also make his debut after being recalled from Dewsbury. Another centre, Kirk Yeaman, is also included after being re-registered and props Scott Taylor and Mickey Paea are back from injury.
Last season: No corresponding fixture.
Last six league matches: Hull KR L L W L L L Hull W L W W L W.
Top try scorers: Ryan Shaw (Hull KR) 6; Fetuli Talanoa (Hull) 12.
Top goal scorers: Ryan Shaw (Hull KR) 41; Marc Sneyd (Hull) 51.
Referee: B Thaler.
Salford (8) v Catalans Dragons (12)
Salford are boosted by the return of stand-off Rob Lui, who has missed the last three matches with a calf injury and takes the place of Jake Shorrocks. Gavin Bennion, who made his debut against Wigan a fortnight ago, and Daniel Murray are vying to take the place of forward Ben Nakubuwai, who is ruled out through concussion.
Catalans have lost stand-off Samisoni Langi to injury but welcome back centre David Mead, prop Remi Casty, loose forward Greg Bird, centre Brayden Wiliame and second rower Louis Anderson after they sat out the cup win over Whitehaven.
Last season: Salford 50 Catalans Dragons 12, Catalans Dragons 38 Salford 6.
Last six league matches: Salford L L W W L L Catalans Dragons L W L L W L.
Top try scorers: Jake Bibby (Salford) 7; David Mead (Catalans Dragons) 6.
Top goal scorers: Rob Lui (Salford) 22; Tony Gigot (Catalans Dragons) 13.
Referee: G Hewer.
Wakefield (7) v Huddersfield (9)
Wakefield have skipper Danny Kirmond back from a three-match injury absence and there are recalls for hooker Tyler Randell and winger Ben Jones-Bishop, with Joe Arundel and Max Jowitt dropping out from the team that lost at Huddersfield.
Huddersfield centre Aaron Murphy and second rower Oliver Roberts both return after missing the last two matches because of injury. Loose forward Daniel Smith drops out after being hurt in the cup win over Wakefield.
Last season: Wakefield 28 Huddersfield 26, Huddersfield 24 Wakefield 16.
Last six league matches: Wakefield L L W L L W Huddersfield L L L L L W.
Top try scorers: Tom Johnstone & Ben Jones-Bishop (Wakefield) 8; Ollie Roberts (Huddersfield) 4.
Top goal scorers: Liam Finn (Wakefield) 29; Danny Brough (Huddersfield) 23.
Referee: J Child.