His entire injury history can be seen here:
https://www.transfermarkt.co.uk/mahmoud-dahoud/verletzungen/spieler/191422#/
His two longest injuries are something that should be behind him now. I think the thing you’re missing is the fact he’s been competing with some great midfielders...
It’s nice to us getting our business done super early if this is true. 3 signings all but complete when we’ve still got 5 games to play this season.
Also seems to be another player De Zerbi is a fan of, tried to sign him for Sassuolo allegedly.