Sydney youngster Zak Jones, the brother of Melbourne co-captain Nathan, has cemented himself in the Swans' line-up the past two seasons.

He played 16 games in 2016, and has played every game so far this season, averaging a career high 21 disposals.

The Dandenong Stingrays product's form has attracted the interest of several rival clubs, particularly St Kilda and North Melbourne, according to 3AW.

Melbourne radio station, 3AW, reports the Saints and Roos are both keeping close tabs on the out-of-contract 22-year-old.

"North Melbourne and St Kilda are the two clubs that I've heard are keeping very close tabs on Zak Jones," AFL journalist Mitch Cleary said on Sportsday.

"He was of their best in last year's grand final and is averaging 21 touches this year.

"(There is a) tight cap at the Swans, they have recently signed Callum Mills and Isaac Heeney to long term deals and they couldn't fit Tom Mitchell in last year.

"So he's one (Jones) who could potentially be moved out if things don't move along there."

Jones has played a total of 36 games for the Swans since being selected with pick No.13 in the 2013 National Draft. He won the MVP at Vic Country in 2013 and was named in the Under-18 All-Australian team.

Like his older brother, he is well known for his toughness and his fierce competitiveness.

Teammate Sam Reid is also out-of-contract and could attract big money offers with Richmond one club that could be interested in the 25-year-old tall.