Doncaster Knights player Lee Audis is fighting for his life after he was involved in a car crash.
Audis, 23, is on a life support machine, says his Championship club.
The Western Daily Press said the former Bath and Coventry scrum-half is in an induced coma at Leeds General Infirmary, where his condition is described as critical but stable.
A statement on the Doncaster Knights website said: "Our thoughts and prayers are with Lee, his family and friends."
It added: "Lee's parents are in contact with the club and we will pass on any change in Lee's condition that the family wishes to share publicly.
"The club has extended its support to the Audis family and stands ready to assist as and when requested. Everyone associated with the club is hoping Lee pulls through.
"Mr and Mrs Audis have passed a message to (Director of Rugby) Brett Davey recognising that Doncaster Knights squad are a tight group and asking that the squad pull together and play for Lee."
Audis joined Doncaster in 2011 and is a former England youth international.