SYDNEY Stack's rise from wayward youngster to AFL star is set to be rewarded with a new contract at Richmond until the end of 2021.

Handed a nine-month contract as the Tigers' last pre-season signing in February, Stack has been offered a two-year extension to remain at Punt Road.

After returning to Western Australia during Richmond's mid-season bye, the 19-year-old has arrived back in Melbourne this week on the verge of signing a fresh deal.

"We are working through the specifics of an offer for Syd at the moment," Stack's manager Cameron Read of Inside 50 Player Management told AFL.com.au.

"Richmond have done a fantastic job in supporting him, he's very happy there and keen to remain given the faith they have showed in him."

Overlooked by all 18 clubs in last year's NAB AFL Draft due to concerns about his off-field preparation, Stack was given a two-month trial by the Tigers across December and January.

After impressing on the Tigers' pre-season camp in Queensland and building a close bond living with coach Damien Hardwick, Stack was officially added to the list in February.

He has since enjoyed a stellar start to his AFL career, playing 11 matches straight in defence since his round three debut and finds himself a contender for the NAB AFL Rising Star.