Kareem Abdul-Jabbar has put four of his six NBA championship rings up for auction.

Abdul-Jabbar has hundreds of items from his memorabilia collection available in the auction, being conducted by Goldin Auctions, with "much of the proceeds" going to his Skyhook Foundation charity to help benefit kids learn about science, technology, engineering and math.

"When it comes to choosing between storing a championship ring or trophy in a room, or providing kids with an opportunity to change their lives, the choice is pretty simple. Sell it all," Abdul-Jabbar wrote on his blog about why he's auctioning off valuables from his sports history.

"Looking back on what I have done with my life, instead of gazing at the sparkle of jewels or gold plating celebrating something I did a long time ago, I'd rather look into the delighted face of a child holding their first caterpillar and think about what I might be doing for their future.

"That's a history that has no price."