A New Era in Baseball: MLB’s Rookie Class Breaks Through Early

Baseball is officially back, and with the start of a new year comes a fresh class of exciting rookies ready to leave their mark on the 2026 season. From teenage phenoms to college stars and even international veterans making the jump, this year's rookie class offers a little bit of everything.

The Next Wave of Position Player Talent

Konnor Griffin - 19, Pittsburgh Pirates

The Pirates have gotten off to a fun start, with fans lining up at PNC Park—cones in hand—ready to cheer on 19-year-old rookie Konnor Griffin. In case you missed it, Fanatics misprinted a batch of Pittsburgh T-shirts reading "Hoist the Cone". The only problem? That slogan didn't actually exist. But instead of rejecting it, Pirates fans did what baseball fans do best and adopted the joke into part of their mythology.

Courtesy of PGHClothingCo/X

Within hours, social media was flooded with memes, and "Hoist the Cone" quickly found its way into Pirates folklore. Instead of stopping online, the joke spilled into the dugout, where players began passing around a celebratory cone after big moments. Soon enough, the meme became a movement.

The energy reached another level when the team announced they would be allowing fans to bring their own cones into the ballpark, turning PNC Park into one of the most unique atmospheres in baseball. Paired with Griffin's arrival—and an already stunning setting—the vibes in Pittsburgh have completely shifted.

After making his debut on April 3, Griffin added to the moment with a post on Instagram, sharing a collection of photos from his first game. One image in particular stood out: Griffin carrying the now-iconic cone, sending fans into a frenzy.

Courtesy of DinkleBurghh/X

The viral moment offered an early glimpse of what the future could look like in Pittsburgh, as a young core of standout players begins to emerge. Griffin’s 6-foot-4 frame, elite athleticism, powerful swing, and emotional maturity beyond his years already give him the look of a cornerstone shortstop. He's regarded as one of the top prospect in years with Keith Law of The Athletic calling him the “most exciting prospect we’ve had in the minors since Mike Trout.”

It's no secret that Pittsburgh has been a city starved for success when it comes to baseball, reaching the postseason just three times in the past 34 years and enduring seven consecutive losing seasons. The young shortstop hopes to help put an end to that drought. "I know it’s a fanbase that’s just starving for a good, winning team," Griffin said. "I want to be a part of that so bad."

In his debut, Griffin doubled, walked and scored a run. Less than a week later, he made an even louder statement, committing to the city by signing a nine-year, $140 million contract extension through 2034, the largest deal in Pirates history. After years of waiting, Griffin looks like the cornerstone Pittsburgh can finally build around.

Chase DeLauter - 24, Cleveland Guardians

While Pittsburgh celebrates their budding star, the Guardians have a rookie hero of their own in Chase DeLauter. The right fielder and James Madison product has already made a splash to start the season, homering five times in his first 50 at-bats. It feels like there's a new DeLauter highlight every day, but what’s drawn the most attention is his unorthodox swing—and how effective it’s been.

"Getting my hands crazy extended through the ball has never really been one of my biggest focus points," DeLauter said. "It’s been more whatever I need to do to get the barrel to the ball. So when I swing like this (hands in), it’s usually because I’m late and I have to somehow get the barrel there. If I try to fully extend, there’s no way I’m gonna get to the ball on time. So those ones are more typically fastballs in, and I’m like, ‘Oh crap, I’m a little beat,’ and I try to turn and get the bat there as fast as I can."

By prioritizing barrel control and quick acceleration over textbook mechanics, DeLauter has the ability to adjust in real time. While it may not look traditional, early returns suggest it works, and he could be a key piece in Cleveland’s lineup for years to come.

Chase DeLauter Statcast. Courtesy of Baseball Savant

Sal Stewart - 22, Cincinnati Reds

After 58 plate appearances with Cincinnati late last season, the Reds gave him a clear directive for the offseason: work on becoming more athletic. This year, he arrived ready to compete, bringing both his bat and elite plate discipline. With more walks than strikeouts, Stewart has slashed .309/.435/.600 so far (AVG, OBP, SLG).

Primarily a third baseman in the minors, the versatile infielder has transitioned to first base this season, allowing him to more regularly slot into the big club lineup. If this start is any indication, Stewart looks ready to turn that adjustment into a long-term role in Cincinnati.

Kevin McGonigle - 21, Detroit Tigers

Widely touted as one of the best hitting prospects in recent years and drawing comparisons to Chase Utley and Alex Bregram, Kevin McGonigle made an immediate impact, collecting four hits on Opening Day. As a childhood fan of Utley, the comparison carried extra weight. "I just love the way [Utley] played," McGonigle said. "He played the game hard. And I feel like he played it the right way, as well. That’s the way I want to play."

Originally drafted as a shortstop, McGonigle has since moved to third base for the Tigers, helping stabilize a position Detroit had been searching to fill. Through his first 16 games this season, he’s hitting .322 with an .920 OPS. His consistent hitting, solid defensive play, and well-documented obsession with the game all point to a player who could emerge as a true star. As Tigers manager A. J. Hinch put it, “This city is going to fall in love with this kid.”

Owen Caissie - 23, Miami Marlins

Another name beginning to emerge is Owen Caissie. Originally drafted by the Chicago Cubs, the right fielder was traded to the Miami Marlins this past offseason. After a standout World Baseball Classic with Team Canada, Caissie has carried that momentum into the start of the season.

Courtesy of MLBPipeline/X

While that pace may be difficult to sustain, Caissie has all the tools to develop into a hitter who can anchor the Marlins lineup for years to come.

JJ Wetherholt - 23, St. Louis Cardinals

JJ Wetherholt has wasted no time making an impression in St. Louis. Known for his above-average tools and advanced feel for the game, the former West Virginia standout has already delivered in big moments. In his major league debut, Wetherholt launched a 425-foot home run over the center field wall. The very next day, he followed it up with a walk-off single to lift the cardinals to 6-5 win over Tampa. Safe to say, it didn’t take long for the organization—and the fanbase—to embrace him with open arms.

JJJ Wetherholt after his walk-off single. Courtesy of cardinals/Instagram.

Pitchers Who Debuted Last Year but Still Qualify as Rookies

Bubba Chandler, 23, Pittsburgh Pirates

One of the most promising young pitchers in baseball, Bubba Chandler, might still be refining his command and execution, but the raw tools are undeniable. Chandler leans heavily on a four-seam fastball (70.1%), while mixing in a changeup (15.9%), slider (12.8%), and an occasional curveball (1.2%). He has all the ingredients of a potential front-line starter, and as he continues to find consistency and develops his secondary pitches, Chandler is emerging as another key piece of Pittsburgh’s developing core.

Trey Yesavage, 22, Toronto Blue Jays

After debuting late last year and even starting in the World Series, Yesavage opened this season on the injured list with a shoulder impingement. Once he makes his return, he’ll look to build on that early experience and solidify his place in Toronto’s rotation.

Cam Schlittler, 25, New York Yankees

After being promoted to the big club on July 9, 2025, Schlittler made an immediate impact, highlighted by a historic 8-inning, 12-strikeout, scoreless performance in Game 3 of the AL Wild Card Series. Despite that postseason breakout, he remains eligible for the 2026 Rookie of the Year award and will look to carry that momentum into a larger role with New York this season.

International Stars Enter the Rookie Conversation

Not every rookie arrives through the traditional pipeline. While technically in their first MLB seasons, Kazuma Okamoto, Munetaka Murakami, and Tatsuya Imai bring years of professional experience from Japan’s Nippon Professional Baseball League (NPB).

Murakami arrived in Chicago with some of the highest expectations, known for his elite power and ability to change a game with one swing. Okamoto offers a more balanced offensive profile in Toronto, combining power with consistency at the plate. On the mound in Houston, Imai adds another dimension to the group, featuring a signature “wrong-way” slider that runs from left to right. Through his first two Major League starts, he’s averaging six inches of that unique movement on his slider. They may carry the rookie label, but their experience suggests they’re ready to make an impact right away.

Tatsuya Imai pitch movement profile. Courtesy of David Adler/MLB.

What stands out about this rookie class isn’t just the individual performances, it’s how quickly they’re beginning to shape the league’s present, not just its future. Every player in this group arrives with a different path, different expectations, and different timelines, but their early impact is already being felt across the majors. The next wave of talent is no longer on the horizon. It's already here, and this is only the beginning.

Edited by: Kelly Cassette