Wigan's growing injury toll will force them to field another untried teenager against Wakefield in the Challenge Cup on Sunday.
With Danny Orr facing several weeks out after tearing knee ligaments at Bradford on Friday, Ian Millward has promoted the 18-year-old Eamon O'Carroll for his debut at Belle Vue.
"It is probably a bit early for him, but he is keen and youthful, so we will give him a chance," Millward said.
Wigan are without their recent signings, Tim Jonkers and Oliver Wilkes, who are both Cup-tied.
Joel Tomkins and Kevin Brown return to the squad, while the Wildcats expect still to be without David Solomona and Ben Jeffries.
St Helens will rest three first-team regulars for the match against Doncaster on Friday. Already without Paul Sculthorpe, who is resting his suspect knee, Daniel Anderson will give a break to the New Zealand pair, Willie Talau and Jason Cayless, who has food poisoning.
The new Welsh club, the Celtic Crusaders, have signed a Spanish international rugby union player, David Mota. The 19-year-old centre will join the Crusaders, unbeaten in the Northern Rail Cup, for training before their Challenge Cup match against Rochdale this Saturday.
"How he hasn't been picked up by some of the Guinness Premiership sides is beyond me," said Chris O'Callaghan, the chief executive of the Bridgend-based club.
The Rugby League is investigating a National Cup game, for amateur clubs, in which a Siddal player was sent off against Rochdale Mayfield for allegedly hitting the referee.