Michael Jennings is the first high profile victim of Parramatta's disaster season, with the Eels centre set to become the most expensive reserve grade player in the competition.

NRL.com has learned Jennings trained with Wentworthville at Ringrose Park on Wednesday night.

It appears the Eels have lost patience with the out-of-sorts former NSW and Australian centre, dropping him back to play for Wentworthville against the Warriors in the Intrust Super Premiership match in Auckland on Saturday.

It comes on the same day Sydney Roosters winger Blake Ferguson agreed to a three-year deal with the Eels from next season.

Jennings, who is on a deal worth close to $800,000 a year, has taken up an option in his favour to remain at the club until the end of 2019.

His demotion has cast doubt over his future at the club.

The Eels have the bye this weekend, however, coach Brad Arthur appears to be holding his senior players accountable for their sub-par performances in 2018 and has drawn a line in the sand.

Jennings has been struggling for form over the past month, but Parramatta's injury woes haven't allowed for change.

He was easily stood up by Tim Lafai in the play that led to the Dragons' first try last week, and then gave up on the chase when it appeared he was still a chance of shutting down the play that finished with Matt Dufty crossing the try line.

It appears that hasn't been lost on the Eels coaching staff, who are in the process of making some significant roster changes at the club for 2019.