Former Collingwood sports science director David Buttifant has joined rival Carlton, continuing his association with Blues coach Mick Malthouse.

Malthouse, who coached Collingwood from 2000 to 2011, guided the Blues to a semi-final in his first season at the club in 2013.

Buttifant has been appointed Carlton's high-performance manager after a 13-year stint with Collingwood, the Blues announced on Wednesday.

"David is recognised as one of the best in his field, not only in Australia but globally," Carlton's football operations manager Andrew McKay said.

"His experience and track record throughout his time in the AFL system is exactly what our football club requires in its pursuit of success.

"We are very pleased to have landed such a highly regarded person for this important role within the football department."

But Carlton defender Jeremy Laidler wants a new home after managing just one game this season under Malthouse.

Laidler is one of eight Blues players who are leaving as the club prepares for a busy trade and draft period.

Carlton also announced on Wednesday that it had delisted senior players Aaron Joseph, Luke Mitchell, Patrick McCarthy and Marcus Davies.

Rookie-listed players Rhys O'Keefe, Fraser Dale and Andrew Collins are the other players to go.

Collins came to Carlton in the trade that sent Shaun Grigg to Richmond.

Joseph played 73 games in five seasons for Carlton and was their best first-year player in 2009.

After two seasons at Geelong, Laidler joined Carlton and flourished with 19 games in 2011.

But injury restricted him to four matches last year and he did not play senior football this season under Malthouse after round two.

"He expressed that he would like to look for an opportunity at another club and we respect and support his decision to do so," McKay said.

The Blues are known to be interested in Collingwood star Dale Thomas, while Blues small forward Eddie Betts is also about to become a free agent and there is plenty of speculation about his future.

AAP