Kristian Dennis goes straight into the St Mirren squad for the Premiership clash against Ross County on Saturday.
The 30-year-old striker signed a two-year deal with the Buddies after leaving Notts County.
Midfielders Kyle Magennis and Ryan Flynn are working their way back from long-term knee injuries.
Ross County boss Stuart Kettlewell hopes to welcome Blair Spittal back to his squad.
The midfielder missed last week's defeat to Dundee United with a thigh strain but has been passed fit to face the Buddies. Joe Chalmers has also been given the thumbs up from a specialist to step up his return after a long-term groin issue and is now back in full training.
However, Callum Morris is again a concern with an Achilles issue which saw him sit out the 2-1 defeat to United, while defender Tom Grivosti has had a minor setback as he battles to overcome a long-standing foot injury.
