A run of just one win from the previous seven League 2 matches had seen Reds sucked into a battle for survival.
Despite safety being secured, Drummy was relieved of his duties this afternoon following a meeting with chairman Ziya Eren.
Turkish owner Eren has called a media conference tomorrow following his departure.
Crawley were beaten 3-0 by Brighton & Hove Albion's under-23s last night at the Amex in the Sussex Senior Cup final, a game that would prove to be both Drummy's and assistant Matt Gray's last.
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