Mate, where are ou pullin this crap from? Seaby had hardly underperformed with West Coast? He had one poor season with west coast (his last) and that was because Cox had a stellar year and the way the game was changing Lynch was chopping out in the ruck and a second rucman wasn't required! Seaby asked to be traded because he new he was slipping down the pecking order. All west coast got for him was a pick upgrade from 28 to 22, hardly a big deal really considering he cost the pick 22 in the first place!
Please though I would be happy to hear about these other number of badly underperformed Ruckman that have fetched good draft picks in trades, fire away.....