Sean Darcy is fit but has a few things to work on before returning to Fremantle's AFL side. (Richard Wainwright/AAP PHOTOS)Sean Darcy is fit but has a few things to work on before returning to Fremantle's AFL side. (Richard Wainwright/AAP PHOTOS) Credit: AAPRampaging Fremantle will persist with veteran tall Mason Cox as Sean Darcy bides his time in the reserves. "There's a few things he's working on," coach Justin Longmuir told reporters on Wednesday. "His stat line was impressive but there is work to do with some of the things he's been working on.