Collingwood forward Mason Cox has been ruled out of the Magpies' AFL clash with Richmond on Thursday night as he struggles for fitness after a knee injury. / Updated 08.06.2020Collingwood's American giant Mason Cox will be left out of the Magpies' team that takes on Richmond in Thursday night's AFL season restart.After struggling with knee problems during the coronavirus break, Cox will instead play in a reserves scratch match on Wednesday.The 29-year-old's absence opens the door for ruckman Darcy Cameron to play his first game for the Magpies after arriving from Sydney during the...…Collingwood forward Mason Cox has been ruled out of the Magpies' AFL clash with Richmond on Thursday night as he struggles for fitness after a knee injury. / Updated 08.06.2020Collingwood's American giant Mason Cox will be left out of the Magpies' team that takes on Richmond in Thursday night's AFL season restart.After struggling with knee problems during the coronavirus break, Cox will instead play in a reserves scratch match on Wednesday.The 29-year-old's absence opens the door for ruckman Darcy Cameron to play his first game for the Magpies after arriving from Sydney during the...WW…