Cox has moved from Western Australia after being drafted at No.24 last year and is living with teammate Mitch Robinson.
"I know itís not a home environment for me but it takes people around it to make it feel like home," Cox said.
"The reason why I signed is that I love my teammates and everyone around them.
"I just love this club and the support everyone gives me. It will be great to spend a few more years with the boys."