Roosters coach Brad Fittler has given the controversial Test forward until the club's final pre Christmas training session to get to know all his new teammates personally.
Mason was excused from training last week to holiday in Queensland after an acrimonious departure from the Bulldogs a fortnight ago.
The 27-year-old says he wants to take on a leadership role with his new club sooner rather than later and is tipping the Roosters to be at least top-eight material in 2008, if not serious premiership contenders.
In another twist in the Mason saga, the Bulldogs have today signed promising young forward Danny Williams to a two-year contract in an apparent deal with the Roosters.
A former Queensland under-19 representative and Junior Kangaroo, 21-year-old Williams was a member of the Roosters' 2007 fulltime squad, playing five first-grade games for the club.
Meanwhile winger Nick Youngquest will play for his fourth club in six years after agreeing to a one-year deal to join Wests Tigers for 2008.
The 24-year-old scored seven tries in 11 games and also kicked 15 goals for Penrith in 2007.
Youngquest has played a total of 33 first grade games in a career which started with Cronulla in 2003. The Wests Tigers say Youngquest will be a valuable asset and fill the hole left by the departure of Daniel Fitzhenry.