As a result, Solskjaer's men are twelfth of the league table and are closer to the relegation zone than the top four.
"They went down [in 1974] with a terrific team on paper", Allardyce told talkSPORT.
"So it isn't beyond the realms of possibility that they (the current side) could catastrophically fall into more problems if confidence goes and injuries stay like they are".
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In Toronto , activists gathered near Danforth and Cambridge Avenue before making their way to the Bloor Viaduct bridge. Climate activists block the Walterdale Bridge during morning commute in downtown Edmonton on Monday, Oct. 7, 2019.
"There's the disturbance of [Paul] Pogba wanting away and who will pop up next saying, 'I see this going the wrong way, I want to leave?'"
Allardyce also highlighted the Manchester club's attacking deficiencies as the root of their problems, and lamented the decision to sell Romelu Lukaku to Inter Milan.
The Belgian left in the summer transfer window and since, Solskjaer's team have struggled to find the net.
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In February 2018 their daughter Stormi was embraced by the Life of Kylie Alum and the singer of "Butterfly Effect". The makeup mogul also denied the cheating allegations on Thursday, tweeting , " Travis and I are on great terms".
"Manchester United do not have enough goals, and you can see it becoming a struggle", he added.
United's next Premier League match is against reigning European champions Liverpool on 20 October. Speaking to Sky Sports, the Norwegian revealed he is happy with what he has got. "The board (is) responsible for this with poor recruitment, poor selection of managers, going with them and then pulling off them".
In other words, on the day after United lost to Newcastle, an insider has briefed the club to say that Solskjaer is done if he loses badly to Liverpool - a move which, intentionally or not, piles more pressure on a man already firmly under the pump. Towards the end the right one we just didn't get him over the line.
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He allowed one run in 1.2 innings in his only other career meeting against Atlanta in his 2018 rookie season. Wainwright's game should not be forgotten, which it likely will be, because of how special he was today.