Anasta added a penalty on the stroke of halftime after Joel Walker was placed on report for a lifting tackle on Pearce, that could have led to the the 23-year-old sustaining a serious injury.
The second period continued in a similar fashion with the hosts dominating possession, and Mitch Aubusson extended the lead just before the hour mark following a fine run after latching onto an inside pass from Pearce.
Sam Perrett added a third following some inspired play from newly re-signed fullback Anthony Minichiello who threw a superb long pass and the Kiwi winger barged his way over the line.
The try was a reward for some superb play from the Roosters, who kept the ball alive on the fifth tackle 11 times.
Pearce added some gloss to the scoreline with his second four-pointer of the season, taking advantage of some good play out of dummy-half from Jake Friend.
Friend was also placed on report for a high shot on Alex McKinnon.
-AAP