The AFL is aware of and investigating after footage surfaced of the ex-GWS and Sydney ruckman appearing to snort a white powder.
The Giants, his current employer, confirmed the shirtless man in the video was Mumford and said the 172-gamer has expressed deep remorse, embarrassment and distress over his actions.
“The club understands the incident took place in 2015 shortly after Shane had suffered a season-ending injury in round 11 that year,” a GWS statement read.
“The club is extremely distressed by the footage and views Shane’s actions as completely counter to the club’s values.”
Mumford, who won a premiership with Sydney in 2012, worked as a part-time GWS ruck coach this season after retiring in 2017 due to a foot injury.
But the 32-year-old was preparing to make a possible shock AFL comeback next season to bolster the Giants’ ruck stocks following the loss of versatile tall Rory Lobb.
GWS indicated it would stick by Mumford but it is unclear whether the revelation has jeopardised his push for a second stint in the AFL.
“The club is disappointed in Shane’s choice of actions at this time and also understands that Shane requires a level of medical support with his health and well-being in mind,” the statement said.
“The club will be working with Shane to ensure he engages in a rehabilitation program along with a range of other measures.”
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