Plymouth Argyle have confirmed that Simon Walton has returned to the club after having his loan at Sheffield United cancelled.
The 22-year-old midfielder suffered a cruciate knee ligament injury during a pre-season friendly against Mansfield.
Walton has undergone surgery on the problem and will continue his recovery at Plymouth.
"The loan has been cancelled so Sheffield United can bring in another player," Pilgrims boss Peter Reid told the club's official website.
"He [Walton] had an operation in Bradford and we will now be monitoring him closely."
Hernia opReid also revealed that striker Rory Fallon has undergone surgery on a hernia in his groin.
"It's a hernia and he had it done on Friday, so we'll wait for the doctors on that one," added Reid.