Curt Herrman of Manhattan said he began collecting Chiefs memorabilia items in 1970, when he attended Super Bowl IV, the team's first Super Bowl win, and took home a football emblazoned with the team's logo.
"It's an old Franklin, NFL size football," Herrman told KSNT-TV. "First piece. And during the Chiefs games, I will hold this ball. It's part of my good luck karma."
Herrman said his basement is now a "Chiefseum," housing 555 items -- and counting.
"A lot of times I'll kind of think to myself, 'OK, I've got enough, I need to slow down because I'm running out of space and I have to make more room,'" Herrman told KMAN news radio. "And then I'll happen to be driving through a small town and there's a little antique store. I'll pull in and there will be three or four things in there that I just can't live without."
Herrman said he started researching about six months ago whether his collection would qualify for a Guinness World Record.
"The largest collection of Kansas City Chiefs related memorabilia," Herrman said. "There isn't a record for that right now. The largest one I saw was the Chicago Bears. The guy had like 340 items. And so I thought, 'well I'm going to apply for that.'"
Herrman said he is now waiting to hear back from Guinness about having his collection verified.