In his illuminating-but-defensive press conference on Tuesday, Mourinho offered so many talking points that the nation's live bloggers struggled to keep up.
From new signings to digs at his counterparts, Mourinho was his usual quotable self in the 28-minute press "briefing".
But one of his most interesting comments, which could be viewed as another jab at his predecessor Louis van Gaal, was implying that managers create their own injury lists.
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"My record with injuries is very low – even from the UEFA studies, there were many times the team with the least injuries in the whole of Europe was mine," the Portuguese manager informed the collected press.
But do his lack of injured players owe him a debt, or is it simply the case that good fortune has followed him thus far in his career?
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Training techniques go a long way in preventing injuries, so perhaps Mourinho is referring to the methods he and his coaches employ in order to keep their players match fit.
But that doesn't account for the attitude of individual players; Cristiano Ronaldo is the prime example of a player who does everything possible to maintain levels of fitness.
His Instagram account is a testament to the hours spent strengthening every part of his body, as is his latest demand that he has his own personal physiotherapist at Real Madrid.
If every player takes insuring himself against injury differently, it's harder for a coach to claim credit. Some players are also more injury-prone than others, so Mourinho would have to actively avoid signing players with a rollercoaster history of fitness.
Then there are those freak accidents on the field or in training, the types that can neither be blamed on manager nor player. There's no way Van Gaal could be blamed for Luke Shaw's horrific leg break against PSV Eindhoven last September that ruled him out of an entire season.
It's hard to believe that any manager can have an all-encompassing impact on their own injury list, but their training techniques, deployment of medical staff and squad rotation obviously have a role in minimising injuries.
Perhaps it's just Jose's way of getting the Old Trafford faithful onside after the last injury-torn campaign. Jurgen Klopp did the same thing at Liverpool, saying he would change the approach to strength and conditioning programmes at the club.
Let's see if The Special One can back up his injury claims in his first season in charge of the Red Devils.