Owen Beck may have to wait for his Bolton debut when Charlton visit on Saturday.
The 20-year-old left-back joined the Trotters on loan from Liverpool this week but, after a disrupted start to the campaign which saw a temporary move to Portuguese side Famalicao aborted, he may need more time to be ready for match action.
Defender Declan John (calf) and forward Jon Dadi Bodvarsson (hamstring) are closing in on returns, while winger Lloyd Isgrove has a foot issue.
Midfielder Josh Sheehan, following knee surgery, and summer signing Eoin Toal may not be ready to start yet despite playing in the 4-1 midweek win over Crewe in the Papa Johns Trophy.
Ryan Inniss is a doubt for Charlton.
The defender suffered an injury against Wycombe on Saturday and was forced off after 74 minutes.
Midfielders Conor McGrandles (hand) and Corey Blackett-Taylor (knee) have missed the last few games, while defender Mandela Egbo (knee) and striker Chuks Aneke (calf) have not played this season.
Midfielder Alex Gilbey joined League Two side Stevenage on a season-long loan on transfer-deadline day.
Subscribe or register today to discover more from DonegalLive.ie
Buy the e-paper of the Donegal Democrat, Donegal People's Press, Donegal Post and Inish Times here for instant access to Donegal's premier news titles.
Keep up with the latest news from Donegal with our daily newsletter featuring the most important stories of the day delivered to your inbox every evening at 5pm.