Sharks utility Ben Barba and Storm lock Dale Finucane each left the field in Melbourne's 30-2 win over Cronulla on Monday night with potentially serious injuries that will require further assessment and may put each man's short-term playing future in doubt.
Barba, held back by coach Shane Flanagan until the 65th minute, left the field 10 minutes later with an ankle injury and left the ground in a moon boot.
Finucane injured his arm 30 seconds from full-time and had to be taken off with an arm injury.
"He's got a dislocated forearm. I'm not quite sure what that means. It happened in the last 30 seconds which is unbelievable," Bellamy said.
"I don't think I've heard of that injury before so I'm not sure what happens now, how long or whatever. Hopefully it won't be too long; he's a really important part of our team, Dale.
"It probably took him a little while to fit in [when he arrived at the start of the year] with what we expected of him and what we wanted of him but he's been a real tough contributor each and every week for us so hopefully if he is out he's not out for too long."
Flanagan also wasn't sure what Barba's immediate prognosis was.
"He's having an ultrasound now, hopefully it's not too bad but we won't know until tomorrow [Tuesday]," Flanagan said.
Flanagan also revealed Barba's reduced minutes in recent weeks were partly a result of an ongoing knee injury.
"Benny's got a bit of a bung knee, it's not just me playing him from the bench and giving him a bit of impact, he's struggled with a bit of a knee injury for a fair period," the Cronulla coach said.
"The injury he's got tonight is nothing to do with his knee but we're managing him through that and it's getting closer to being 100 per cent and he's done a really good job off the bench the last couple of weeks."