Kane Cornes believes Adelaide’s ruck department is currently a massive weakness, and suggests the Crows should be looking to the Holden Centre for their answer.

Speaking on SEN SA Breakfast, Cornes was critical of the Crows’ ruck work against Geelong last night in the absence of Sam Jacobs.

“Not great if you’re an Adelaide fan," said Cornes.

“Reilly O’Brien started the game well, he won the first hitout of the game… but after that he was completely outclassed.”

“It was probably around the ground he struggled, and also he lacked some strength in the ruck duels. Particularly at times I thought he was rag-dolled at throw-ins and was easily moved aside.”

With Jacobs currently out of the side with a knee injury, Adelaide look likely to struggle to win hitouts.

“It’s a massive issue for them. We know Jacobs’ best footy is past him at 31 years of age, and his formline would suggest that.

“They’ve got to somehow get him back in the side quickly, because from what I’ve seen Reilly O’Brien is not up to AFL level.”

The Port Adelaide Hall of Famer suggested that with Jacobs on his last legs, the Crows might be looking at an All-Australian ruckman from another club to solve their issues.

“We know there have been reports of Adelaide being into Brodie Grundy from Collingwood - the South Australian, he’s got one year left on his contract before he becomes a free agent," added Cornes.

“(Adelaide) need to up the ante with that. It’s probably going to cost them $1.1 million to try and get him back (to South Australia).

“They need to do it, because they don’t really have any other option.

“You wonder whether they missed a trick not being in the hunt for Scott Lycett like Port Adelaide were. They’ve got some big issues with their ruck department.”