Boxing fans will get a sneak peek at the Muhammad Ali trading card set that's coming later this month from Leaf Trading Cards tonight on eBay.

The company has decided to sell the 1/1 proof cards from 2016 Leaf Muhammad Ali Immortal Collection directly to the public via the auction site. (Update: The cards will be posted at a specific time announced in advance on Tuesday.)

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Update: The card sold for $465,000.

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The greatest copy of The Great One's greatest card will be sold later this summer.

It's the only PSA 10 copy of Wayne Gretzky's 1979-80 O-Pee-Chee Rookie Card, and it will be on the block for the first time in five years as part of the Goldin Auctions sale during the National Sports Collectors Convention in Atlantic City, N.J., on Aug. 4.

"The fact that just one card has achieved this perfect grading is remarkable," said Ken Goldin, the founder of the auction house. "With the recent surge in interest among serious collectors for high-grade examples of Rookie Cards, we expect this Gretzky card to establish a new benchmark. The average sales for a PSA 9 Gretzky's has increased 600 percent in the past five years. If this card were to see a similar increase, it might become hockey's first $500,000 trading card."

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Update: Lelands has updated its posting to say the jersey is from that game, but likely worn before the fight.

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It's one of the most-memorable -- and probably most-forgettable -- moments in Washington Nationals history all at once and the game-used jersey of the team's biggest star can be yours.

The jersey Bryce Harper wore when he was choked by teammate Jonathan Papelbon during a game last Sept. 27 is on the auction block via Lelands.

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Somebody is going to pay dearly for this managerial meltdown.

The sweatshirt and cap worn by Detroit Tigers manager Brad Ausmus on Monday night have hit the auction block via MLB Auctions to benefit the Tiny Tigers tee-ball program funded by the Detroit Tigers Foundation.

And, so far, it looks this one will pay for a few extra tees.

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The impressive stash of 1992 Olympic Dream Team memorabilia will probably get the post-sale attention, but there are a few other big-ticket items presently the auction block and ending in the next few days via Heritage Auctions.

The weirdest? Al Capone's fingerprints.

In 1929, Capone provided these prints after he was sent to the Eastern State Penitentiary in Philadelphia. It's an 8-inch square document that's also signed by Capone -- and it's presently sitting at $44,000 ($52,580 with a buyer's premium) with two days remaining in the sale.

Sure, it's not a sports item -- but there are some big pieces in that world that more than a few collectors would want to get their hands on in this auction. Keep reading for more.

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Memory Lane Inc.'s Spring Classics Rarities Auction ended with more than $2.9 million in sales during the weekend and four cards were of note helping the company reach that mark.

Three of them topped $100,000, while a fourth key card from the past topped $90,000 before a 20 percent premium was added.

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An original piece of Norman Rockwell promotional artwork is up for grabs via Heritage Auctions and is expected to fetch a hefty sum because of its famous creator.

But it's also got a famous owner, too.

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A previously unknown batch of 1857 baseball documents fetched $3.26 million on Sunday via SCP Auctions, which sold a set of “Laws of Base Ball” papers -- items that pre-date Alexander Cartwright's contributions to the game.

It's not quite a record-holder for historic sports documents, but it's not shabby considering its auction history. According to the Laguna Niguel, Calif.-based auction house, these documents were first found as part of a 1999 manuscript auction with minimal details in their listing and bought without them having been researched. It was tucked away after a $12,650 purchase until recently.

Dr. James Naismith's "Rules of Basketball" from 1891 sold for $4.3 million, while the "Rules of Soccer" from 1859 sold for $1.4 million.

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If you're a fan of comic book movies, you might not recognize the character on this piece of original art that has hit the auction block. But if you've been to the movies in the past few years, you've seen the character.

And you'll be seeing plenty more of him in the future.

It's the painted cover from Marvel Preview No. 4 from way back in January 1976 and this issue from the bland-named series is the first appearance and origin of Star-Lord -- the lead character in Guardians of the Galaxy.

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It's a low-grade specimen of the most-iconic and expensive baseball card of all time and it's leading off the action as lot No. 1 in the current Robert Edward Auctions sale.

With 10 days remaining in the company's spring sale, theSGC 10 (Poor 1) Sweet Caporal T206 Honus Wagner already has attracted 29 bids after an opening bid of $50,000.

What's it at now?

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A priceless stash of autographed items and game-used shoes from the 1992 USA Basketball Dream Team is hitting the auction block via Heritage Auctions, giving deep-pocketed collectors a shot at owning items from the one team that arguably revolutionized basketball on a global scale.

More than 20 lots are up for grabs -- all from the collection of Dr. David A. Fischer, who was the physician for the gold-winning squad, which is packed with legends.

"It's arguably the most significant offering of Dream Team game-used gear ever to surface in the collectible marketplace," said Chris Ivy, director of Sports Auctions at Heritage. "Due to the brief existence of the team, and the enormous fame and wealth of its members, very little Dream Team material has become available.

"This is a rare opportunity to acquire such significant material from the Dream Team," he said. "Like the team itself, there will never be another auction like this again."

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Update: The card sold for $478,000.

"The Say Hey Kid" will likely be the next icon of the past to set a record on the auction block as one of the highest-graded specimens of a key card is now up for grabs via Heritage Auctions.

The card is a PSA 9 copy of Willie Mays' 1952 Topps card and the opening bid is $200,000.

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A holiday card signed by President John F. Kennedy and First Lady Jacqueline Kennedy is a pricey and impressive piece, but the card presently up for sale via Goldin Auctions is even more unique.

It's from 1963, and it's one of only 15 known to have been signed sometime between Nov. 18 and Nov. 20 of that year -- down time between trips -- before his death in Dallas on Nov. 22.

The official White House cards for that year also were prepared with facsimile signatures but were not sent out. These signed cards were later discovered in the 1980s, according to the auction company.

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It's been 39 years since Joe Namath last suited up for an NFL game, but his 1965 Topps Rookie Card remains an iconic one and is among the most-valuable RCs out there.

And a high-grade specimen on eBay right now is going to prove it when the auction ends.

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Three years ago, the New York Mets privately sold a group of game-used jerseys from its first game following the Sept. 11, 2001, terrorist attacks.

The biggest jersey of them all has been re-sold -- so it can be displayed in public.

Two minority owners of the team paid $365,000 for the jersey worn by Mike Piazza during that memorable game so it can be displayed at the 9/11 Memorial and Museum, the Baseball Hall of Fame or the Mets museum at CitiField.

The jersey had been put up for sale via Goldin Auctions, which entertained offers to end an auction for the jersey early only on the condition it be displayed. The jersey's story landed it on the back cover of the New York Daily News today.

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The current SCP Auctions sale includes items from the personal collections of Baseball Hall of Famer Don Drysdale and collections of memorabilia that include plenty of other big names, but it's a selection of championship rings here that's highlight-worthy.

Below is a gallery of 18 rings up for sale now and ending on April 23. Click below to enter the gallery, get a closer look, see who's owned them and what the bidding sits at now.

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One of Kobe Bryant's final NBA All-Star Game jerseys got a big send-off on Thursday just like the star who wore it.

How? Via NBA Auctions.

The jersey was worn during the first half of his final All-Star Game on Feb. 14 in Toronto and sold for $100,040 after 74 bids -- basically doubling what is believed to be the previous high for a jersey sold on the site.

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Update: The documents sold for $3.26 million.

Dr. James Naismith's "Rules of Basketball" from 1891 sold for $4.3 million, while the "Rules of Soccer" from 1859 sold for $1.4 million.

What might previously unknown 1857 baseball documents fetch?

That's what we'll find out soon via SCP Auctions as a set of “Laws of Base Ball” documents from 1857 -- documents that pre-date Alexander Cartwright's contributions to the game -- will hit the market in April.

The author here is Daniel Lucius “Doc” Adams, who was the President of the New York Knickerbockers, and the documents' origin has been researched by John Thorn, who has been the official MLB historian since 2011. The documents note guidelines such as the length of base paths, number of players on the field, a nine-inning game and more.

“When Doc Adams set to work in late 1856, none of these aspects of the game were settled,” Thorn said. “This was some seven years after Cartwright had left New York for Hawaii, never to return. For his role in making baseball the success it is, Doc Adams may now be counted as first among the Founding Fathers of Baseball.

“No earlier baseball manuscript of this significance has ever come onto the open market,” Thorn said. “In 1857, baseball made its great leap forward, and these are the documents that reveal what it was like to be present at the creation.”

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Nearly 80 lots of Babe Ruth-related memorabilia are currently up for grabs as part of a Goldin Auctions sale that benefits the Babe Ruth Birthplace Museum.

The event opened on Monday and runs until March 5 with five percent of the winning bid price of all lots going to the Museum. Among the items are a contract, a game-used bat, autographed baseballs and many other items related to the biggest name in the history of baseball.

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One of the biggest football auctions of the year is set for Friday and Saturday as Hunt Auctions continues its traditional Super Bowl sale.

The Super Bowl 50 Live Auction will be at the Moscone Center in San Francisco with more than 900 lots including modern-day game-dated memorabilia like the J.J. Watt Houston Texans gamer above -- a jersey with a hefty price already in early bidding -- and pieces from football's early years. too.

Because of its high profile as part of the NFL Experience show, prices can be pretty strong once the auctions close.

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Mark Hamill may need to chime in on this one.

No, it's not an autograph for the actor to authenticate -- it's a prop DL-44 heavy blaster pistol of Luke Skywalker's from The Empire Strikes Back and it's up for auction with a $200,000 opening bid.

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More than 20 years after his death, the memorabilia of Hall of Famer and Los Angeles Dodgers pitching great Don Drysdale is coming to auction.

The sale will be handled by Laguna Niguel, Calif.-based SCP Auctions and will open on April 6 with more than 1,000 lots as part of the overall event.

“We feel honored to have been chosen by the Drysdale family to bring this extraordinary collection to auction,” said SCP Auctions President David Kohler. “Don was among the most accomplished and revered pitchers in Major League Baseball history and his impressive assemblage of awards and accolades speaks volumes as to his winning ways out on the mound.”

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A near-perfect PSA 9 Hank Aaron 1954 Topps Rookie Card led the way in the Mile High Card Company auction that ended during the weekend -- and it was just one of 10 lots that topped the $20,000 mark.

All were graded vintage cards in high grades or key specimens slabbed by PSA or SGC -- meanwhile 13 other auctions topped the $10,000 plateau in the sale.

Click the first image below to enter our gallery and get a closer look at the top 10 lots as well their final sale prices. We added an extra one so you can see a surprising sale price on the only PSA 10 Joe Torre 1962 Topps Rookie Card in existence.

Follow Buzz on Twitter @BlowoutBuzz or send email to BlowoutBuzz@blowoutcards.com. 

>> Click here to buy baseball cards on BlowoutCards.com.

Game-used baseball bats are often some of the most-abused and most-personalized pieces of game-used memorabilia to hit the market.

And, because of the number of bats a player uses in a season, they can also be bargain-priced at times. But in the case of the Old Hickory J143M used by Mike Trout to hit four home runs during 2013? Well, that bat opened at $2,000 and sits at $7,000 after 17 bids with plenty of time remaining ... so not every bat can be a bargain.

Check out this gallery of 18 gamers presently up for grabs right now from Goldin Auctions. You can see a larger image, the model specs and the opening bid price once inside the gallery.

Follow Buzz on Twitter @BlowoutBuzz or send email to BlowoutBuzz@blowoutcards.com. 

>> Click here to buy baseball cards on BlowoutCards.com.

Demand for The Mick continues to be an all-time high.

A run of high-grade Mickey Mantle Topps and Bowman baseball cards from 1951 to 1969 sold for more than $750,000 this weekend in a Memory Lane Inc. auction.

"The Empire State Collection" consisted of 21 PSA-graded cards and, according to the company, 14 of them set new record-highs for their condition.

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