Simplify the following text for a Grade 5 native English-speaking person.
Original: Vollach 's unique managing skills and leadership was the major reason that Maccabi went from being a mediocre football club to a successful empire in the top flight , winning their first championship in 1984 and retaining it in 1985 , which Maccabi Haifa also finished at the head of the house in the Intertoto home stage . During this time , he began to be known as `` the brains of Maccabi Haifa '' .
Simplified: Vollach was the Major reason for Maccabi 's success .