A list so stacked with talent and a multitude of young Victorians, it's tough to retain all of them.
GWS have been no stranger to that concept over the years, and have had to deal with a range of exits - some of whom have gone on to bigger and better things after seeking greener pastures elsewhere.
Here are the 10 best players that GWS have lost since their introduction into the competition.
1. Adam Treloar
It's hard to look past anyone other than gun midfielder Adam Treloar to take out the top spot.
Ever since his arrival at the end of 2015, Treloar has been one of Collingwood's most important players.
The 26-year-old's run and carry and explosive impact around the contests has been pivotal in the Magpies resurgence over the last couple of years, and is sure to be one of the Pies' most significant names going forward as they strive to win this years premiership.
Having finished runner-up in the best and fairest in 2015, Treloar had his best season to date when he decided to leave the Giants, leaving a gaping hole in the Giants midfield and making them rue his absence ever since.
