De Boer started life at Fremantle on the rookie list in 2008. He made his debut in round 6, 2009, against West Coast, and is now one of the fiercest competitors in the game.
Although more keen to talk about the team, the 23-year-old admitted reaching the milestone was nice.
"It's memorable, and probably something I'll look back on when it's all said and done and be proud of," de Boer said.
Since senior coach Ross Lyon took over at Fremantle after the 2011 season, de Boer's improvement has been significant.
He has lifted his disposals per game by four and has also kicked 25 goals in the past two years compared to 14 in his previous three.
His tackling has also become a major feature of his game. De Boer has laid more than 10 tackles in five separate matches over his career and only Sydney Swan Ryan O'Keefe and Brisbane Lion Jack Redden have laid more tackles in the AFL in the past two seasons.
"It's just great to be able to play so many games, firstly under ‘Harvs’ (Mark Harvey) who gave me an opportunity which I'm very grateful for, and now under Ross, I'm learning a lot more about the game," de Boer said.
"I’m probably just understanding my role in the team a bit more specifically and where that fits in and how I can complement the side as well.
"That's evolution. You're going to get better and a bit wiser as you go along and I'm learning things too as I go."
De Boer will have an important role in the preliminary final against the Swans playing as either a defensive forward or a second run-with midfielder alongside Ryan Crowley as he did in the round eight draw at the SCG.
"I played on a few different players that night," de Boer said.
"I played up forward and in the midfield. I was on (Jarrad) McVeigh at certain points and definitely learned a lot off him and hopefully I can use that knowledge going into this game."
On the eve of the club’s first-ever home preliminary final, Western Australia has been enveloped by Fremantle fever.
"It's great for our fans and supporters, everyone's getting on board," de Boer said.
"It's good for WA football."
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