Naitanui was seen running at training, while also taking part in some kicking and stationary handball exercises. He is recovering from the ruptured ACL he suffered in round 22 last season.
The 26-year-old was amongst a number of wounded Eagles returning to the park, including Scott Lycett, who is recovering from his PCL reconstruction.
Lycett has recently taken remarkable strides in his recovery and could even be fit for round one.
“He is back in training now and doing a couple of drills and moving really well, so I’m excited to see what the next month holds for him,” midfield coach Dean Cox told TAB Radio.
“The closer we do get to games it will start to unfold when he will be ready for the AFL season.”
They were facing a ruck crisis at the end of last season. With Natanui (ACL), Lycett (PCL) and Giles (hamstring) filling up the medical room.
The situation got worse when new recruit Nathan Vardy suffered a knock to his knee in training. However with Vardy now fit and Lycett on the mend, things are looking up for the Eagles.
Defender Tom Barrass also rejoined the main group. Liam Duggan (hamstring) and Daniel Venebles (foot) were on light duties. Sam Mitchell also had to leave the main session early due to an ankle niggle.
The Eagles face Greater Western Sydney in their first match of the JLT Community series on February 18.