Red Sox first baseman Mike Napoli reveals the memorabilia he kept from the World Series, how he'd react to a trading card with some of his beard in it and the strangest autograph request he's ever received. (3:36)

The home run ball hit by Boston Red Sox catcher Carlton Fisk off Cincinnati Reds pitcher Pat Darcy in Game 6 of the 1975 World Series -- considered one of the most iconic moments in baseball history -- is being sold by Robert Edward Auctions as part of its April catalog. The reserve price is $100,000.

Fisk got his wish that day and the ball stayed fair, hitting the foul pole and giving the Red Sox a 7-6 victory. As fans celebrated, the ball actually conveniently dropped into the glove of Reds outfielder George Foster.

Game 6, 1975: Carlton Fisk provides one of the most memorable moments in World Series history. AP Photo/Harry Cabluck

Foster kept the ball, marked with a facsimile signature of then-American League president Lee MacPhail, until 1999, when it was sold in an auction for $113,273.

Red Sox fan Rich Elfman, who was at the game, bought the ball, but because his children don't have any interest in it, he's decided to sell it, according to Brian Dwyer, consignment director for the auction house.

Although the Red Sox went on to lose Game 7 -- and have won three titles in the past decade -- Dwyer said the Fisk ball might be the most memorable piece of Red Sox memorabilia.

"There really isn't a moment like this, one really memorable play, when the Red Sox have won in recent years," Dwyer said.

That doesn't mean that the Red Sox winning so many times hasn't affected the marketplace.

"Now is as good as ever to sell Red Sox memorabilia," Dwyer said. "Winning so much has really rejuvenated the fan base."

The most expensive ball sold at auction in Red Sox history comes from a negative moment. The ball that dribbled through first baseman Bill Buckner's legs against the New York Mets in Game 6 of the 1986 World Series last sold for $418,250 in May 2012.