Parramatta have put Canberra's season on life support after inflicting a ninth loss of the season for the 2025 minor premiers on Saturday.
The Eels were resolute in defence and did enough in attack to come away with a scrappy 15-12 win at CommBank Stadium for their fifth win of the year.
Ricky Stuart's Raiders now need to win seven or more of their last 10 games if they are any hope of returning to the finals.
It's a stunning fall from grace for the Raiders, who lost just five regular-season games last year when they claimed the top spot by four points.
Diminutive half Ronald Volkman was brilliant for the Eels, while Isaiah Iongi had two try assists and was almost faultless under the high ball.