Digging for potential sleeper prospects requires a well-rounded approach that balances production, scout feedback and underlying data to better understand which players are ascending as we head into the offseason.
Today, we’ll be examining 10 such prospects from the National League. Each of these players stood out not only for the numbers on the back of their baseball cards but also for their under-the-hood Statcast metrics, which have become the most important analytical tool for evaluating.
Yassel Soler, 3B, Diamondbacks
2025 marked Soler’s first full professional season after spending each of the last two years primarily on the complex. The corner infielder hit .240/.342/.395 with 12 home runs for Low-A Visalia while keeping his strikeout rate respectable with a mark of 22.3%.
Soler’s underlying data largely supports his production, as he shows solid plate skills and plus raw power. His 90th percentile exit velocity of 105.7 mph is plus for both age and level. His angles, however, are subpar, leading to fewer barrels and less power production than his underlying numbers might otherwise suggest.
Diego Tornes, OF, Braves
The headliner of the Braves’ 2025 International signing class, Tornes impressed in his professional debut in 2025. He hit .279/.395/.402 over 32 games, was selected as a Dominican Summer League all-star and ranked fourth in our top 35 DSL prospect ranking.
Tornes’ underlying data is strong, and he shows a nice blend of skills. Despite not hitting any home runs in DSL play and beginning the season at just 16 years old, Tornes displays plus underlying exit velocity data. His 105.4 mph 90th percentile EV was the fifth-highest mark among Braves prospects and the highest in the organization among players 21 or younger.
Tornes should debut stateside in 2026 and is a name to monitor.
Edgardo De Leon, 3B, Cubs
After an outstanding 2024 debut in the Dominican Summer League in which he hit .277/.431/.433 over 48 games, De Leon ventured stateside in 2025. The result was a nice season in the Arizona Complex League, as the 19-year-old hit .276/.353/.500 with five doubles, five triples and five home runs.
While De Leon has some swing-and-miss in his game, based on his underlying contact and swing rates, he shows easy plus raw power. He posted a 90th percentile exit velocity of 107.6 mph in 2025, which was one of the best in the Cubs’ organization this season.
Watch for De Leon to debut with Low-A Myrtle Beach to begin 2026.
Anthony Stephan, OF, Reds
A 13th-round pick out of Virginia in 2024, Stephan has been one of the better under-the-radar names in the Reds’ system all season. Over 85 games with High-A Dayton, he hit .245/.349/.397 while showcasing some strong under-the-hood data.
Stephan isn’t a power hitter, but he’s shown average-or-better metrics across the board, including above-average bat-to-ball skills, plus swing decisions, average power and strong batted-ball angles. While Stephan’s line was already 13% better than the average player in the Midwest League, he could be primed to take another step forward in 2026 with a slight improvement in power.
Roc Riggio, 2B, Rockies
Acquired by the Rockies in the Jake Bird trade at the deadline, Riggio produced a strong season in 2025, hitting .262/.363/.517 over 88 games spent mostly in the Double-A Eastern League.
Riggio showed solid plate skills this season, led by plus swing decisions and good angles on contact. His raw power is fringe-average, but he shows the ability to optimize his hard contact and get the ball in the air consistently. This, in turn, led to higher barrel rates and balanced production.
With how the Jake Bird experience has worked out so far in the Bronx, the Yankees might come to regret this trade in the coming years.
Chase Harlan, 3B, Dodgers
Drafted in the third round in 2024 out of the Pennsylvania high school ranks, Harlan enjoyed a solid professional debut in 2025. He split his season between the Arizona Complex League and Low-A, slashing .269/.357/.442 with nine home runs across all levels of competition.
Harlan shows prodigious power that could grow into a Coby Mayo-type profile at peak, as he pairs it with fringe-average plate skills. Additionally, his 90th percentile exit velocity of 106.1 mph is the same as fellow Dodger and Top 100 Prospect Dalton Rushing.
If Harlan can sharpen his plate skills, he could raise his profile significantly in 2026.
Kemp Alderman, OF, Marlins
Unranked in the Marlins’ system entering the season, Alderman has rocketed up the rankings in 2025 and now slots in at No. 11 in the team’s top 30. The former Ole Miss star hit .283/.335/.473 with 21 home runs in a season spent primarily with Double-A Pensacola.
Alderman shows plus game power with enough angles to match. There is some natural swing-and-miss in his game, which is accentuated by his tendency to expand the zone. He does, however, show a solid approach at the plate, attacking pitches in the zone at a high rate. Even so, how Alderman’s bat-to-ball skills will translate to the major leagues is still up for some debate.
Marco Dinges, C, Brewers
One of the more underrated prospects in the game, Dinges enjoyed a breakout season in 2025. The former Florida State standout hit .300/.416/.514 over 77 games, mostly with High-A Wisconsin. Dinges shows strong underlying data that supports his production, and he has a slight chance to stick behind the plate long term.
No matter how the glove develops in the coming years, though, the bat might be enough to carry his profile. Dinges shows fringe plate skills with plus raw power and good angles on contact. His 107.2 mph 90th percentile exit velocity was second in the Brewers’ system for players age 22 or younger.
Randy Guzman, OF, Mets
After a spending two seasons in the Dominican Summer League, Guzman enjoyed a strong stateside debut in 2025. After hitting .282/.371/.474 with seven home runs over 49 games for the Mets’ Florida Complex League team, he was promoted to Low-A St. Lucie for the final month of the season. There, Guzman hit .333/.381/.604 over 26 games, setting him up as potential breakout candidate for 2026.
Guzman shows real outlier power, as evidenced by a 108.1 mph 90th percentile exit velocity this season that was only bested by Ryan Clifford among Mets prospects. It’s not empty power, either, Guzman shows good batted-ball angles and an above-average zone contact rate. He’s fairly swing happy, expanding the zone regularly, which is something that will need to be ironed out in the coming years.
Tony Blanco, Jr., OF, Pirates
It’s not unreasonable to say that, when it comes to raw power, Blanco’s only peers in the game are fellow Pirate Oneil Cruz, the Yankees’ Aaron Judge and Giancarlo Stanton and the Dodgers’ Shohei Ohtani.
Clearly, Blanco hits the ball hard. How hard? His 90th percentile exit velocity of 113.5 mph would rank among the top five in the major leagues this season.
The son of former major leaguer Tony Blanco, the younger Blanco shows outlier power and angles but major swing-and-miss, as well. That pock mark on his profile makes him a true risk/reward prospect, as there’s a better chance he never makes enough contact to amount to something than there is he develops into a star.
That said, looking for outliers is the name of the game when it comes to identifying sleeper prospects, and Blanco, despite his flaws, fits that label to a tee.
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