Every July, contenders reach the same crossroads: protect the future or chase a championship.
Most prospects are discussed as untouchables until suddenly they aren’t. Front offices that spend six months preaching patience often find themselves one impact starter, one middle-of-the-order bat, or one shutdown reliever away from a legitimate World Series run. That’s when premium prospects become currency.
6 Elite Prospects Who Could Headline Blockbuster Deals at MLB Trade Deadline
As the 2026 trade deadline approaches, several organizations are positioned to make aggressive moves. The prospects below aren’t necessarily the most expendable players in baseball, but they represent the intersection of prospect value, organizational depth, and front-office behavior that makes blockbuster trades possible.
The most important factor isn’t talent. It’s whether the executive running the club has historically shown a willingness to push chips into the middle of the table.
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Kash Mayfield, LHP, Padres
Scouting Snapshot
Standing 6-foot-4 with a projectable frame, he attacks hitters with a fastball that sits in the mid-90s and can touch higher with late riding life. His best secondary offering is a power curveball that flashes plus and generates swings and misses against both right- and left-handed hitters. He also features a developing changeup that has improved significantly since entering pro ball.
Scouts are particularly impressed with Mayfield’s poise, strike-throwing ability, and advanced feel for sequencing. Several evaluators project him as a future No. 2 starter with a realistic ceiling of a frontline arm if the changeup continues to develop.
MLB Comparison: A young MacKenzie Gore with better present command.
Why he’s at the top of the list
No executive in baseball has a longer history of sacrificing tomorrow for today than San Diego President of Baseball Operations A.J. Preller.
The Padres have repeatedly traded elite prospects in pursuit of immediate upgrades, including future stars Trea Turner, CJ Abrams, James Wood, MacKenzie Gore and Leo De Vries. Preller’s track record suggests that almost no prospect is completely untouchable if the return significantly improves the major-league club.
That puts Mayfield squarely in the spotlight.
The left-hander has elevated his stock considerably during 2026, emerging as one of the most dominant young pitchers in the minors. His value may never be higher.
Why San Diego would move him
The Padres remain built to win immediately around Fernando Tatis Jr., Manny Machado and a veteran core. If a frontline starter such as Tarik Skubal, Sandy Alcantara or another impact arm becomes available, Mayfield is precisely the type of prospect opposing clubs will demand. Industry speculation has already connected Mayfield to potential blockbuster discussions.
Prediction:
Most likely prospect on this list to be traded.
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Jefferson Rojas, SS, Cubs
Scouting Snapshot
Rojas has become one of the fastest-rising middle-infield prospects in baseball. A fluid athlete with quick hands and advanced instincts, he projects to remain at shortstop long term while offering offensive upside that extends beyond traditional defense-first shortstops.
At the plate, Rojas shows above-average bat speed, improving power projection, and a mature approach uncommon for his age. Scouts see a player capable of producing both average and on-base percentage while contributing 20-plus home run potential during his prime.
Defensively, his range, arm strength, and baseball IQ give him a strong chance to become an above-average major league shortstop.
MLB Comparison: A blend of Willy Adames and Ezequiel Tovar.
The perfect trade chip
Few prospects fit a contender’s trade profile better than Jefferson Rojas.
The Cubs are expected to be aggressive buyers, particularly for pitching. Jed Hoyer’s club has been repeatedly connected to starting pitching upgrades, and league observers increasingly view Rojas as the prospect most likely to headline a major acquisition.
The reason is simple: organizational fit.
Chicago has long-term commitments throughout the infield. Dansby Swanson, Nico Hoerner and Alex Bregman create a difficult path for Rojas to become an everyday player in Chicago despite his considerable upside.
Understanding Jed Hoyer
Unlike Preller, Hoyer is not reckless. But he has shown a willingness to trade premium talent when he believes the major-league roster is positioned to contend.
The Cubs have spent years building toward this moment. They aren’t likely to waste a legitimate postseason opportunity because they were unwilling to move a prospect blocked by established veterans.
Prediction:
Most likely Cub prospect to headline a deadline blockbuster.
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Ryan Sloan, RHP, Mariners
Scouting Snapshot
Sloan possesses arguably the highest pure upside among pitching prospects in Seattle’s system. The former prep standout combines premium velocity with a prototypical starter’s frame and developing arsenal.
His fastball routinely reaches the upper-90s with excellent carry through the strike zone. His slider flashes as a true plus offering and serves as his primary strikeout weapon. The development of his changeup will ultimately determine whether he reaches his ceiling as a frontline starter.
The Mariners’ renowned pitching development program has helped refine his delivery and command, allowing evaluators to project a future top-of-the-rotation profile.
MLB Comparison: A younger version of Logan Gilbert with more velocity.
The Jerry Dipoto factor
Whenever the Mariners appear in trade rumors, one question matters:
What does Jerry Dipoto think he needs?
Few executives trade more frequently than Seattle’s President of Baseball Operations. Dipoto has consistently demonstrated a willingness to move prospects when he believes the major-league roster can improve.
The Mariners continue to possess one of baseball’s strongest pitching infrastructures, but offensive production remains a recurring concern.
Why Sloan makes sense
Pitching prospects carry tremendous value on the trade market, and Sloan’s ceiling gives Seattle a potential centerpiece in negotiations.
If the Mariners pursue an impact hitter with multiple years of control, Sloan is exactly the type of prospect who could unlock a deal.
Prediction:
Better than even odds, Sloan is discussed extensively in trade talks before July 31.
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Andrew Fischer, 3B, Brewers
Scouting Snapshot
Fischer is one of the more polished collegiate bats to enter professional baseball in recent years. His offensive profile centers around advanced plate discipline, consistent hard contact, and legitimate power to all fields.
Unlike many young power hitters, Fischer demonstrates a mature understanding of the strike zone and rarely expands unnecessarily. Scouts believe he can hit for both average and power at the major-league level.
Defensively, opinions are mixed regarding his long-term position. Some evaluators believe he remains at third base, while others see an eventual move to first base. Regardless, the bat profiles strongly enough to carry the position.
MLB Comparison: A left-handed version of Alec Bohm with more power upside.
Milwaukee’s balancing act
The Brewers have become one of baseball’s most efficient organizations.
General Manager Matt Arnold consistently balances long-term sustainability with present-day competitiveness. Milwaukee rarely empties its farm system, but the club frequently identifies prospects it can leverage to improve the major-league roster.
That makes Fischer fascinating.
Unlike organizations operating with $300 million payrolls, the Brewers must maximize every roster spot. If Arnold identifies a controllable major-league player who fills a need, Fischer could become an attractive centerpiece.
Why the Brewers could act
Milwaukee appears capable of competing for a postseason spot again, and their window remains open. Prospects such as Fischer become valuable when trying to acquire pitching without significantly increasing payroll commitments.
Prediction:
One of the most realistic prospect-for-major-league-player trade candidates in baseball.
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Ben Hess, RHP, Yankees
Scouting Snapshot
Hess may have the most explosive raw stuff in the Yankees’ farm system. The Alabama product features a fastball that routinely sits in the upper-90s and pairs it with a hard-breaking slider capable of generating strikeouts at any level.
When healthy and mechanically synchronized, Hess demonstrates the repertoire of a potential mid-rotation starter. The primary developmental focus remains command consistency and limiting walks.
The Yankees have been encouraged by his durability improvements and believe there is still significant untapped upside.
MLB Comparison: Michael King with a bigger fastball and more risk.
Cashman’s dilemma
The Yankees are all-in on winning now.
The challenge for Brian Cashman is determining how much prospect capital should be sacrificed to maximize what may be one of New York’s strongest championship opportunities in years.
The Yankees are reportedly prioritizing bullpen help and catching depth as the deadline approaches.
Why Hess is vulnerable
Unlike top-tier prospects who are viewed as organizational cornerstones, Hess occupies a tier where his value may be greatest as a trade asset.
Contenders consistently overpay for pitching and relief help in July. Hess may ultimately become the prospect New York is most comfortable moving.
Why he may survive
Cashman has become noticeably more protective of elite prospects in recent years. The Yankees no longer move top prospects as casually as they once did.
Prediction:
More likely to move than Yankees fans realize.
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Josue De Paula, OF, Dodgers
Scouting Snapshot
Few prospects in baseball combine offensive upside and plate discipline the way De Paula does. The left-handed hitting outfielder possesses elite strike-zone awareness, consistently posting walk rates well above his peers while maintaining impressive contact quality.
His swing is smooth and leveraged, generating easy power to all fields without sacrificing approach. Scouts believe he could eventually produce .280-plus averages with 30-home-run potential and elite on-base percentages.
Defensively, he profiles best in a corner-outfield spot, where his strong arm and improving athleticism provide additional value.
Many evaluators view De Paula as a future All-Star and potential middle-of-the-order cornerstone.
MLB Comparison: A young Kyle Tucker with even greater on-base ability.
The wild card
Talent-wise, De Paula is arguably the best prospect on this list.
That’s also why he’s the least likely to be traded.
Andrew Friedman has built a reputation as one of baseball’s most disciplined executives. While the Dodgers are perpetually aggressive, they are also exceptionally selective about moving elite young talent.
Why De Paula remains a possibility
The Dodgers are chasing championships every season.
If an ace becomes available with multiple years of control, Los Angeles possesses the prospect depth necessary to outbid nearly everyone. De Paula could instantly become the centerpiece of baseball’s biggest deadline deal.
Why Friedman resists
The Dodgers view prospects differently from most organizations. They see elite prospects as future payroll flexibility and long-term roster stability.
Moving De Paula would require an extraordinary return.
Prediction
The highest upside name on this list, but the hardest player to pry away.
The Bottom Line
If baseball executives had to place bets today, Kash Mayfield and Jefferson Rojas would likely generate the most interest around the league.
The deciding factor isn’t prospect quality. It’s organizational philosophy.
A.J. Preller has spent a decade proving he’ll trade almost anyone. Jed Hoyer is under pressure to capitalize on a contender. Matt Arnold and Jerry Dipoto are practical opportunists. Brian Cashman is selective but motivated.
Andrew Friedman remains the toughest executive in baseball to force into a prospect-for-veteran blockbuster.
Which is why Josue De Paula may be the best prospect on this list—and still the least likely to change uniforms this summer.
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