The 30-year-old played 20 games in 2016 taking his tally to 157 matches since making his debut in 2004.
Young utility Tom Lamb has also signed a one-year contract extension to continue his career with the Eagles into 2017.
“Sam has been a wonderful servant for many years and we’re delighted to have him commit to the club for another season,” West Coast General Manager of Football Craig Vozzo said.
“His experience is invaluable to our young players and we think he’s still playing at a high level, so to have him on board for 2017 is fantastic.
“After an injury-interrupted 2015, Tom had a solid year of growth last season. Tom has just turned 20 and we look forward to helping him further improve and achieve his significant potential.
“Simon, Jordan and Paddy are all quality young men who are developing well and we look forward to them continuing to grow in 2017.”