The 42-16 defeat at Swinton Lions has left Hunslet Hawks with a crippling injury list.
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email alerts from Middleton Today.Hawks coach Graeme Hallas revealed: "Aiden Faal has a groin injury and may well not play again this season.
* Click here to become a fan of Middleton Today on Facebook."He has been carrying it for a few months and we've been managing the situation as best we can, but we may well have pushed it too far on Sunday.
"He'll need an operation. He has been going pretty well and it is a blow to us and to the kid himself."
* Click here for latest Middleton, Hunslet & Belle Isle news.Hallas – whose team visit Rochdale Hornets in Co-op Championship One on Sunday – added: "Michael Mark spent the night in hospital. He was coughing up blood, so it was a precaution.
"We're awaiting the doctor's report to see what the situation is.
"Nico Slain and Nathan Larvin both have knee injuries and we finished the game with 12 fit bodies."