Meanwhile, Pogba's temperamental relationship with Mourinho has been a talking point throughout the season, with Barcelona heavily linked with the World Cup-winning Frenchman.
The Florida-based owners, who are in daily contact with executive vice-chairman Ed Woodward, are determined to uphold their reputation for giving managers time to turn hard situations around at Old Trafford.
Mourinho has also said "some [players] care more than others" at United and that "no player is bigger than the club".
Former Old Trafford favourite Paul Scholes declared the Portuguese to be "embarrassing" the club and expressed surprise he remained in the post after Saturday's 3-1 loss at West Ham.
'I do not want to interfere in their affairs, everything is clear with Paul, you have to balance things out.
United will look for a much-needed win before the global break when Newcastle United arrive at Old Trafford in the Premier League this Saturday.
It's hardly surprising that as the pressure continues to mount on the Special One, the French manager's name is thrown straight into the conversation.
Jose Mourinho's 45-minute hotel rant at Manchester United players sinks club deeper into crisis
The Ecuadorian later wrote he liked the post "without reading the text". "I am fully supportive of the manager and my team-mates".
Keane played for United for 12 years, helping them to seven Premier League titles, and when asked about the club's current crop of stars during an interview with Notts TV, he said: "There's a lot of cry babies out there".
"We are all giving our everything to improve the results".
Just how long does he intend to go on fighting United for?
Speaking to reporters prior to the match, Marcelino said: "They are physically among the three strongest teams in Europe".
"I'm not even surprised by the outcome of this game", the post read, alongside images of Valencia in action on Tuesday night.