Kalyn Ponga copped three head knocks but he bounced out of them to steer the Knights to a 28-18 victory over the Sea Eagles on Sunday night.
Newcastle winger Greg Marzhew scored the first hat-trick of his NRL career and Dom Young sealed it with a brilliant individual try at the death.
Tolutau Koula was binned in the 65th minute for a high shot on Ponga, but Manly were brave without their three best players in Tom Trbojevic, Jake Trbojevic and Daly Cherry-Evans.