AFC Wimbledon defender Andy Frampton could be facing up to two months on the sidelines.
The centre-half was carried off on a stretcher just 10 minutes into Saturday's goalless draw at leaders Scunthorpe after suffering a shoulder injury.
"The opening signs are that Andy has dislocated his shoulder," said Dons manager Neal Ardley.
"He managed to put it back in, which is very painful.
"It's too early to say, but normally it could be six to eight weeks out and that would be a massive blow because he's been immense this season."