Against that, only one Geelong player on the ground on Thursday had more rebound 50s than Duncan.Yeah, but Tuohy can play everywhere on the ground bar the ruck.
Duncan can't play from either fifty, he doesn't offer the marking ability of Tuohy. I'd trust Tuohy to lock down a forward if Henry, Kolo or Zuthrie went down. Duncan is still really between the arcs.
Anyway, they'll both play in the Prelim.
Secondarily, he was playing half forward at times in the match - best evidenced by providing a marking contest inside 50 in the 2nd quarter, the one that Henry crumbed for a goal.
Geelong freely rotate Duncan between half back, the wing and half forward within matches. Take a look at his position changes at the centre bounces through the Port match, or really any match this season, if you don't believe me.