Michael Sollbauer is 'still groggy' and will be assessed before Barnsley visit Stoke City tomorrow from 7.45pm.
Centre-back Sollbauer suffered a neck injury and blow to the head while winning a late penalty which was scored in the Reds' 2-2 draw at home to Bristol City on Saturday.
Caretaker Adam Murray said: "He's a lot better. He still feels a little bit groggy. We will have to make a late decision on him. We're not 100 per cent if he was unconscious so we're not sure of the protocol until our doctor talks to our physio a bit more. We have some little niggles, not too serious. We will make a late call on one or two. Callum Styles is still out."
Stoke, who won 2-0 at Luton Town on Saturday, have so far collected eight points from their opening five games which is six more than the Reds who drew 2-2 at home to Bristol City at the weekend.
The Potters beat Barnsley 4-2 at Oakwell last November, the last game of Murray's last spell as caretaker, then thrashed Gerhard Struber's Reds 4-0 in Staffordshire in July.
Murray said: "In both games last season we were poor. For myself in the first game then Gerhard in the second game it was a real deflating feeling. We didn't see those performances coming. We can't have any complacency in our game. With all due respect to our players, we can't turn up at 80 per cent and expect to get anything. We have to be 100 per cent.
"In every game, every team has a threat for set pieces. Tomorrow will be no different. Unfortunately, we can't put our players on stretching tables to make them any bigger. We just have to be clever and smart in our set-up. We have to compete and be aggressive in our mindset and not switch off.
"Stoke can play with technical players but go direct if they need to. We have to be good in the basics but they have areas we can exploit with our style.
"We just need a little bit of the rub of the green and to tighten up one a few things. The next three points will take us up a few levels."
Jacob Brown – who joined Stoke last month from Barnsley for a fee believed to be about £2.5million – has started one league game and come off the bench in three others while he has a goal in the EFL Cup. The 22-year-old joined the Reds aged 16 from Guiseley and made 82 appearances, scoring 12 goals. Brown's former Oakwell captain Adam Davies is also at Stoke, having been made number one goalkeeper for this season and starting every league match so far.
Murray said: "He (Brown) was a very good player for us. We know his strengths but unfortunately for him we know his weakness as well. We are aware of what the players who have been in our building bring to their team. When it comes to matchday they are opponents and we want to beat them. There have been a couple of text flying around with people trying to find information."