RUCKMAN Sam Jacobs has signed a three-year contract extension with Adelaide, tying him to the Crows until at least the end of 2019.

Jacobs, 27, has played 105 matches for Adelaide since crossing from Carlton in 2011.

He has developed into one of the most influential ruckmen in the AFL and since 2012 has ranked second in the League for hit-outs and hit-outs to advantage.

The consistency that saw him included in the 2012 All Australian squad has also allowed him to finish top five at the Crows' best and fairest in two of the past three seasons.

"I am really enjoying my football at the Crows and look forward to continuing my career at West Lakes," Jacobs said.

"There is a very positive vibe at the club and we have an exciting group of players working together to achieve success."

Like Jake Lever last week, Jacobs' recommitment comes before the Crows lock in a permanent coach.

Scott Camporeale remains the interim coach, but the club isn't expected to announce a long-term replacement for Phil Walsh until after the season.

It didn't matter to Lever, nor does it to Jacobs, who said he had faith that those responsible would select the right person for the job.

"I've got full confidence that the committee … will get the right person," he said.

"I wanted to stick around, I always wanted to play for the Crows and I'm glad it's all locked in now.

"I'm an Adelaide boy, I had my time away, I wanted to come back to play for the Crows."

Jacobs' commitment until 2019 shores up the club's ruck stocks after it re-signed rookie ruckman Reilly O'Brien last week.

O'Brien has been hugely impressive in his debut season in the SANFL, quickly surpassing Jack Osborn and Luke Lowden as the club's No. 2 ruckman.

Jacobs said the teenager had indeed helped his own game this year.

"He's come in with a really great attitude and a want to learn and I guess [I'm helping him] just understand the game a bit more and the demands of rucking," Jacobs said.

"I play a lot of high minutes in the AFL but he's doing the same thing in the SANFL, and for a guy to come in and do that at 18 years old is a pretty good effort.

"He keeps me improving myself by the way he pushes me at training … his follow up work's really strong and that's probably something I can grow in my game."