Cox will play his 277th match at Simonds Stadium on Saturday night to go past Glen Jakovich's club record of 276.
"It's a lot of games," Cox said.
"I suppose getting to Jako's record wasn't a massive goal but I'm proud of what I've done in my footy career, to be able to represent this great club so many times.
"So 300, if it happens it happens, who knows? But it's not a focus point of mine."