St Helens forward Mark Flanagan will miss the rest of the season as he needs surgery on an anterior cruciate ligament injury.
The 25-year-old suffered the injury early on in the Super League game against Hull KR at Craven Park two weeks ago. Saints casualty list already includes the likes of Jonny Lomax, James Roby and Tony Puletua.
"It's a devastating personal blow for the player and adds further strain to our already seriously depleted squad," said Saints boss Nathan Brown.
"We were more than surprised that the offending "tackle" was not the subject of serious disciplinary review. It appeared to be caused by the third player in the tackle in a classic 'cannonball tackle'.
"Anthony Laffranchi also received one shortly after in the same game and again no disciplinary action was taken. "Mark missed the subsequent Challenge Cup Game against Hull KR. He is a great young player whose season is over and yet no action was or has been taken.
"It just adds to the growing frustration as to the lack of consistency so often experienced with disciplinary proceedings and which has major consequential effects on players' careers and club's seasons. "As a club we will, of course, always accept any punishment our players are given; and all we ask is for the same clarity and consistency for all players and all clubs."
Also coach Nathan Brown has been fined £250 for comments about referee Phil Bentham following their home defeat to Catalan.
Brown, 39, was found guilty of improper conduct and publicly criticising a match official, a breach of two Operational Rules and the RFL's Respect Policy. He was instructed to pay £250 immediately with a further £250 suspended until the end of the 2014 season.
Earlier in the season, Leeds coach Brian McDermott was also fined for comments made after their match against the Dragons. Brown's assistant, Jamahl Lolesi, was handed a similar punishment earlier this month for comments he made to a match official during their win over Salford.
Hull KR coach Craig Sandercock was also handed a £250 suspended fine for publicly criticising match officials following Rovers' recent game against Huddersfield.