Emerging Adelaide ruckman Reilly O'Brien has re-signed with the club for a further two years, tying him to West Lakes until at least the end of 2021.

The 23-year old took over the number one ruck duties at Adelaide from the injured Sam Jacobs this season and has been a shining light throughout the club's campaign.

O'Brien is averaging 14.9 disposals, four clearances and 34.7 hitouts in 14 games.

The youngster was pleased to commit his future to the Crows.

“The Crows have shown enormous faith in me, so it's fantastic to be able to sign a new deal and commit to the Club,” O’Brien told the club website

“It’s been awesome to get the opportunity to play more senior footy this year and being able to contribute to the team.

“I’m really enjoying the challenge of getting the best out of myself each week and the help from ‘Doc’ Clarke and Sauce to improve my ruck craft has been great.”

Crows General Manager List Management and Strategy Justin Reid said O’Brien had earned his new contract on the back of hard work.

“Reilly had to wait patiently for his opportunity, but he’s really seized it this year on the back of a really solid pre-season,” Reid said.

“After seeing Reilly develop over a few years, we knew what he was capable of and he’s really growing as an AFL ruckman every single week.

“We always wanted to keep him at the footy club, so we’re delighted he’s signed for two more years.”