The front rower suffered a knee injury in the side's opening match at the Auckland Nines.
He was ruled out of the remainder of the tournament by Roosters Medical Staff following the injury and underwent surgery after returning to Sydney.
It is expected that Isaac's recovery will take 4-6 weeks.
After tearing his ACL in his return from injury, in the Round 15 Holden Cup fixture against the Bulldogs at ANZ Stadium, Tautau underwent a second knee reconstruction in as many seasons.
On a limited working load since suffering the injury, Tautau has responded well to treatment and has returned to running and light training.
It is still expected that he will make a return to play mid-season.