Eamonn Brophy could be out for up to four weeks after suffering an ankle ligament in last week's match against Motherwell.
Speaking to the press this afternoon, St Mirren manager Jim Goodwin admitted the injury doesn't appear as bad as was initially thought.
We've had some positive feedback from the specialist yesterday.
"The MRI scan initially was a wee bit concerning, but it looks like it won't be as long as first feared.
"We're hoping it's only going to be three to four weeks as opposed to eight weeks which was first feared initially.
"We'll try and rush him as much as we can while at the same time being fair to him and making sure he's OK to come back in.
"It is pleasing. We're a little light at the top of the pitch at the moment."
Brophy picked up his injury in our 1-1 draw against Motherwell last week
The Buddies will also be without Curtis Main for tomorrow night's match against St Johnstone.
The forward made his return to the side as a substitute in Saturday's win over Hibernian, but won't be available tomorrow.
Curtis Main is struggling, he will miss tomorrow night.
"He's not long back from injury when he came on and played against Hibs on Saturday for 20 minutes.
"He didn't feel right yesterday so tomorrow will be too soon. I imagine he'll be available for the weekend."
