DENVER — Washington Nationals assistant general manager Bob Miller has placed his 2001 World Series ring up for auction to raise money for his colleague, Doug Harris, who is undergoing treatment for leukemia.

Harris, the Nationals’ assistant GM and vice president of player personnel, has been battling leukemia since July, the second time he’s fought the disease. Earlier this summer, Harris’ wife, Lisa, set up a GoFundMe page with a goal of raising $400,000 to pay for an expensive CAR-T cell therapy treatment. That campaign raised more than $150,000.

Miller was the director of baseball operations for the Arizona Diamondbacks in 2001, the year they beat the New York Yankees in Game 7 to clinch the state's first major-sports championship.

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“I’ve got the memories from 2001, but the physical ring means nothing,” Miller said. “It’s sitting in a vault. I’m proud of it, but I don’t need it.”

Harris, in his role overseeing the Nationals’ farm system, has played a significant role in the development of several of the team's young stars. Diamondbacks outfielder Steven Souza Jr., who was drafted and developed by the Nationals, said he still views Harris as a sort of baseball father figure.

“He has an ability to understand the game, but be personable and be straightforward and care about other people. He always puts other people first," Souza said.

“I think that’s what Bob sees. It’s an amazing thing for somebody to give up their World Series ring so that Doug can get these treatments. I really wish more people would step up and help out.”

Miller’s ring had a bid of $10,500 as of Friday morning. The auction, which can be found at auctions.mlb.com, ends Tuesday night.

Nick Piecoro is a reporter at The Arizona Republic, which is part of the USA TODAY Network. Reach him at (602) 444-8680 or nick.piecoro@arizonarepublic.com. Follow him on Twitter @nickpiecoro.