“It’s always difficult at this time of the year when you have to make decisions on the playing list and we are required to part ways with players who we have worked so closely with, some over many years,” general manager of football Craig Vozzo said.
“We would like to acknowledge and sincerely thank Pat, Jamie, Kane, Brant, Alec and Corey for their contributions to our club and wish them well for the future.”
McGinnity is the most experienced of the six, playing 93 games in eight seasons, however, he only managed three this year.
Bennell played 30 games with the Eagles after playing 57 games with Melbourne between 2009 and 2012.
Kane Lucas played 42 games with Carlton, but did not add to that tally with West Coast since joining the club in 2015.
Colledge played three games for West Coast, two in 2014 and one last season.
Father-son recruit Alec Waterman and Corey Adamson were yet to debut.