Josh Treacy marked a long kick from Patrick Voss to score his first goal of the day to put Dockers ahead.
Voss has also started to have an impact on the game but has not been able to finish his job missing a run shot and a long shot from 55m out.
Luke Parker showed his pace as Murphy Reid latched onto the ball from the old side before slotting home from close range.
“He’s the kid who steals candy from you,” Russell quipped on Kayo Sports.
Charlie Comden has been cleared to return after a concussion scare.
Freo 27, Roos 13 with four minutes left in Q1.
