Fittler was a major drawcard for the 2014 Nines event, coming out of retirement to don the boots for the Roosters and scoring a memorable 50m intercept try on the opening day of the two-day Eden Park event.
The 42-year-old was keen to back up again next year but his hopes have been dashed by a foot injury he suffered while jogging on the beach.
"After the Nines I went home and broke my foot, a Jones fracture, just running on the beach. It was a pretty awful injury, actually. I wore a boot for months so that is swaying my decision to say no."
Fittler enjoyed his stint back in the playing ranks and was so impressed with the Nines format he believes it could soon play an even bigger role in the NRL pre-season.
"Because of the success last year, pre-seasons might be made up now of a Nines competition. I can see it as the future because it was extremely popular at home on TV and it was popular among the players and the coaches, who have a massive influence on the game. It was awesome. The players were coming around [the ground] and watching [other teams] and that just really showed me players wanted to play."
The two-time premiership winner says Nines benefits from the fact it holds true to the physical nature of the 13-a-side version of the game.
"I've played Sevens which doesn't look like rugby league. I've watched Sevens rugby which doesn't look like rugby. The one thing about Nines rugby league is that it looks like our game but it's most probably better to watch. It's something that has been a real positive for the game."
Fittler is enjoying his media role with the Channel Nine commentary team and recently bought a rural property to give his two young children a different life experience.
"My kids were born in The Rocks and grew up in Rushcutters Bay [in Sydney] so they only know the middle of the city. They are now on a farm which is a little bit weird.
"I bought four lamas. I'm going to get some horses. We've got a lot of work to do."