Liam Gordon and Chris Kane return to the St Johnstone squad ahead of Saturday's visit of Livingston.
Centre-back Gordon (fractured elbow) and frontman Kane sat out last week's 7-0 pasting by Celtic but are back in for the Livi clash in Perth.
However, midfielders Drey Wright and David Wotherspoon (both knee) remain out.
Livingston full-back Nicky Devlin is a doubt after sustaining a knock in a challenge that saw Motherwell's Jake Carroll handed a two-match ban.
Scott Robinson and Chris Erskine are back in training after knee injuries and could feature.
Defender Hakeem Odoffin remains sidelined following knee surgery.
Provisional St Johnstone squad: Clark, Duffy, Foster, Tanser, Gordon, Vihmann, Anderson, Kerr, Callachan, Davidson, Swanson, McCann, McClean, Craig, O'Halloran, Kane, McMillan, Hendry, Kennedy, Parish, Johnstone.
Provisional Livingston squad: Stewart, Devlin, McMillan, Lamie, Lithgow, Pepe, Bartley, Jacobs, Pittman, Erskine, Sibbald, Lawson, Robinson, Lawless, Crawford, Souda, Dykes, Miller, Tiffoney, Henderson, Sarkic.
