Filippo Inzaghi's Benevento clinched promotion to Serie A on Monday with seven league games to spare.
Former Cagliari striker Marco Sau came off the bench to score the only goal in Benevento's 1-0 victory over Juve Stabia, a result that sealed the Serie B title.
Benevento, who have won 23 of their 31 league games and lost just once, have a 24-point advantage over Crotone and Cittadella.
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Ascoli were the last club to be promoted with seven games remaining, and they did so in 1977-78 when only two points were awarded for a victory.