What about clearance stats? They don't prove you go in hard and get your own ball? Murphy's clearance numbers are top 10 in the AFL. Other names there are Watson, Cotchin, Judd, Boyd, Thompson, etc.
Clearance stats highlight which players are in the middle more often.
Swan is Collingwood's best clearance player.....Thomas and Ball would both be harder at the ball than him though.
Thomas is one of those rare players who has no regard for his own body, he just throws himself at the footy.
Using clearances and contested possession as some kind of 'hardness' measure is incorrect.