I would take Parkin's opinion over that of Mal Brown's.
IMO Otto has been judged too harshly by his critics who seem to ignore what has happened to him the past couple of years. Yes in 2002 his impact was less than in 2001 but our big man department was ravaged by injuries that year so Otto had to fill-in in about half a dozen positions at the one time. IMO his form was good without being outstanding. Remember in 2001 we had Benny Gale, Richo and Holland as well as Otto all flying. They made Otto's job easier. Also he wasn't the main guy in the ruck that year, so he kicked more goals playing up forward. In 2002, Benny had retired, Holland did his knee and Richo began to have his hamstring problems. Last year of course Otto fell off a ladder and onto a stake which ended up him needing back surgery. There was no guarantee he would at all last year but he returned by round 11? and I would say by the time of our last few games he was back to his best as a ruckman.
This year I reckon his continued on. He's only had one bad game (against Adelaide). His only flaw in his ruckwork is he does tap the ball too much to his ankles but it might be good for him (and advantageous to us) if we had a real ruck coach instead of hiring retired CHFs to help him
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I would personally also play Otto at CHF when he's "resting" out of the ruck. IMO that's a natural position for him where he can lead up the ground to provide a target as well as allowing him to become a more damaging player by kicking a couple of goals each week.