West Coast's Andrew Embley, Pat McGinnity, Brad Sheppard and Jacob Brennan have signed contract extensions.
"It's nice to have the contract extended for 12 months. At this stage of my career it makes sense to look at it each year.," Embley said about his new one-year deal.
McGinnity, Sheppard and Brennan have all signed on for two years.
"We see all of those players as integral members of our squad," West Coast list and contracts manager Craig Vozzo said.
"Brad Sheppard is a player we rate very highly and anticipate will play a significant role in the improvement we are looking for in pushing inside the top four and enhancing our premiership aspirations.
"He has many of the traits we need to take that next quantum leap and after recent surgery, we look forward to a strong pre-season from him as part of his planned development.
"Pat McGinnity was one of our most consistent players throughout the year and Jacob Brennan had an outstanding debut season."