Brody Grundy,along with Max Gawn,is considered the premier ruckman in the competition.Credit:AAP
He is a dual All-Australian and arguably the best big man in the league but the physical punishment a ruckman typically endures means he could struggle to still be playing by the end of the contract,when he will be 33.
Shaw,the former Magpies'skipper and coach,said Lance Franklin's on-going knee issues entering the seventh season of his nine-year contract with the Swans should be a warning to the Pies.
"I look at Buddy's body now and he might not get to nine or 10 (years). He (Grundy) is 26 (in April) but ruckmen are a different breed and they are only one jump and one bad landing and one knee hit away from not playing for a long time,"Shaw said.
"I would have given him five. That would have been heaps. If he didn't want it,sometimes you have got to go to the well and (play) hard. He is a good player but the thing about Brodie is that he has become like a midfielder. Have a look at the last couple of premierships that have been won – they (teams) didn't have a dominant ruckman.
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"They were competitive,(Toby) Nankervis (at Richmond)... it's not like you have to have a dominant ruckman to win. Look at the Western Bulldogs,they didn't have a dominant ruckman."
Grundy's best football is arguably still ahead of him and,with suitors already lining up,including from his home town of Adelaide,and with these offers set to escalate this year,because he could have explored free agency after this season,the Magpies had to ease their usual stance of not awarding long-term deals. The club had originally not wanted to offer more than five years.