Baseball loves a prodigy. A hot month, a viral highlight, a few 450-foot bombs—and suddenly a 21-year-old is being called the face of the franchise.
But sometimes the hype machine moves faster than the player’s development. Here are times the baseball world handed out the crown a little too early, only to watch things fizzle out before greatness ever truly arrived.
13. Matt Moore

After his electric debut with the Rays, Moore was viewed as the next big lefty ace. But control issues and arm problems derailed what looked like a golden career.
12. Joba Chamberlain

Joba Mania was real—he had the stuff, the intensity, the name. But between role changes and injuries, the hype never became long-term success.
11. Delmon Young

He was the first overall pick and billed as a generational talent. He had some big moments but never became the star everyone expected.
10. Michael Fulmer

Fulmer won Rookie of the Year and looked like an anchor in Detroit’s rotation. But injuries took a toll, and he never returned to that early form.
9. Wily Mo Peña

The power was ridiculous—he could hit balls into orbit. But that raw strength never translated into consistent production.
8. Kyle Drabek

He was the centerpiece of the trade that sent Roy Halladay to Philly. Unfortunately, he never lived up to the pressure or his top-prospect status.
7. Dustin Ackley

Ackley was the second overall pick and an on-base machine in college. But when he got to the bigs, the hit tool just didn’t stick.
6. Scott Kingery

The Phillies gave him a big contract before he ever played a game, expecting a do-it-all spark plug. Instead, he struggled to find a role—and consistent playing time.
5. Jason Heyward

Heyward hit a home run in his first MLB at-bat and was instantly labeled the next big thing. While he’s had a solid career, he never quite became the superstar many predicted.
4. Mark Appel

Appel went first overall in 2013 but struggled to get traction in the minors. He retired without ever pitching in the majors—then made a comeback years later, but the hype was long gone.
3. Tyler Glasnow

The tools are unreal and the upside is still tantalizing, but health has always held him back. Every time it looks like he’s about to dominate, something stalls the momentum.
2. Byron Buxton

Buxton was hailed as a five-tool phenom and future MVP. And while the flashes have been jaw-dropping, injuries have made his career one giant tease.
Read More: Ranking the 20 Most Charismatic NBA Stars of All Time
1. Stephen Strasburg

Strasburg’s debut was legendary, and for a moment he looked like baseball’s savior. He won a World Series and was elite when healthy, but his body just never held up for the long haul.
Read More: From Cool to Captivating: The NFL’s Most Charismatic Quarterbacks