New Cardiff City signing Jack Simpson is still not ready to start for his new club, meaning the options to replace Cedric Kipre for Wednesday night's game against West Brom appear to have narrowed significantly.
The centre-back joined on a permanent deal from Rangers last week, however Morison said last week that he was not ready to play a full 90 minutes.
He was named on the bench against Birmingham City at the weekend, though, which might have pointed to his fitness levels being higher than initially anticipated. However, Morison halted that train of thought.
READ MORE: Cardiff City transfer news Live: Latest on signings, departures and pre-West Brom press conference
"Nothing has changed," Morison said of the ex-Rangers man. "He hasn't played a game. It would be a big decision if we decide to play him.
"He hasn't played a game in pre-season. He hasn't miraculously got a game under his belt. So he is in the same situation."
Cardiff's best defensive performances have come when Kipre and Perry Ng have started alongside each other. In the two games in which they have started as a centre-back pairing, Cardiff are yet to conceded a goal.
In the two games in which those two were not the starting choice at centre-back, including the Carabao Cup game, the Bluebirds have shipped five goals.
Given suspension has already ruled Ng out of one game and Kipre unable to play against the Baggies, it is frustrating that City cannot keep any consistency in the backline.
"It's just the way it goes. We will just have to deal with it," Morison added. "It's why you have the squad and you expect people to step up.
"Hopefully, whoever I select will step up and continue that good form that we have had in the couple of good games."
Curtis Nelson was pulled out of the squad for the clash with Birmingham City at the weekend after two poor performances in the two previous games against Reading and Portsmouth.
However, Morison confirmed that was because of an injury issue, rather than him being jettisoned from the squad. "He just had a little niggle. It wasn't worth the risk because we had brought Jack in, so we didn't have to take an unnecessary risk."
Nelson, though, is in contention for the trip to The Hawthorns.
One player who won't be available for selection is Isaak Davies. The youngster is still some way off full fitness, with Morison adding: "He is going to be a few weeks away. He has got a lot of boxes to tick before he is anywhere near a football pitch."
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