ATLANTA — Warren Spahn’s son doesn’t want to choose a sole heir among his five children, so he has put his father’s 1957 Cy Young award on the market.

Greg Spahn, the only child of baseball’s career winningest left-hander, will have more than 800 items — most of Warren’s Spahn’s memorabilia collection sold in 406 separate lots — at a live auction that begins Monday at the Javits Center in New York.

“I just felt like the time is right,” Greg Spahn said. “With everything that we sell, I’ll split the proceeds with the kids.”

Hunt Auctions has a price range between $75,000 and $125,000 for the Cy Young Award. Other expensive items include a 1958 National League championship ring, 300th career victory ball and Spahn’s personal Hall of Fame ring.

The event is being held in conjunction with Tuesday’s All-Star game at Citi Field.

Greg Spahn is retired from real estate sales and investments, but said he wants extra college money for his children.

He added that his father, who was born in Buffalo and died in 2003 at age 82, did not want the memorabilia to become a burden. Greg Spahn, who lives on the family ranch in Broken Arrow, Okla., has moved hundreds of bats, uniforms, hats, cards, plaques and more three different times but has never sold anything from the collection.

“We’ve had it either on display in two museums or stored in two houses, and then there’s concerns like security and condition,” Spahn said.

Many of Warren Spahn’s achievements still stand today. His 363 victories rank fifth on the career list, his 63 shutouts rank sixth and his 5,200-plus innings pitched rank eighth. He was on the NL All-Star team 14 years and won 20 games an NL-record 13 times.