The 28-year-old, who has played 135 games for Fremantle since being recruited from the Calder Cannons, was signed through to the end of season 2012 and has now committed to the club through to the end of the 2014 season.
"Ryan has had really solid season so far and we are very pleased that, on the back of that, he has committed to the club for a further two years," said general manager of player management Brad Lloyd.
"He's a highly regarded member of the playing group and integral to our aim of achieving sustained success."
TUNE IN TO DOCKER TV THIS AFTERNOON FOR AN EXCLUSIVE INTERVIEW WITH RYAN CROWLEY
