SEATTLE — It didn’t take long for Julio Rodríguez to announce himself as baseball’s next generational force. At just 21 years old in 2022, the Seattle Mariners center fielder delivered a rookie campaign most players can only dream of: a .284 average, an .853 OPS, 28 home runs, 25 stolen bases, 5.7 fWAR, American League Rookie of the Year honors, an All-Star selection, a Silver Slugger, and a top-10 MVP finish. It wasn’t just a breakout. It was a warning shot.

Three seasons later, the résumé has only grown louder. Two more All-Star appearances. Two more top-10 MVP finishes. Another Silver Slugger. And last year, Rodríguez became the first player in Major League history to record at least 110 home runs and 110 stolen bases within his first four seasons. He’s 25. Already historic. Already elite.

And according to Jon Morosi, he hasn’t even hit his ceiling yet.

“I’m not going to say we’re just beginning to see the potential,” Morosi said this week. “We’re already seeing the results. But to me, this is the year that Julio really opens up and enters his prime — and that is a scary thought for the rest of the American League.”

Scary might be an understatement.

For all of Rodríguez’s brilliance, there has been a curious pattern in his young career — one that has kept him just shy of fully untouchable status. Slow starts. First-half stretches that look merely “very good” instead of transcendent.

The numbers tell the story. In first halves, Rodríguez owns a career .260/.319/.418 slash line with a .737 OPS. Solid. Respectable. Not otherworldly. But after the All-Star break? He transforms into something else entirely: .297/.351/.552 with a thunderous .902 OPS. Pitchers stop breathing easy. Stadiums brace for damage.

Last season followed the script almost perfectly. A .731 OPS in the first half gave way to a blistering .900 OPS in the second. The turning point came when Rodríguez declined to participate in the All-Star Game, choosing instead to reset mentally and physically for the stretch run. The decision raised eyebrows at the time. In hindsight, it may have revealed something deeper — a hitter learning how to manage his own greatness.

Morosi believes the adjustment wasn’t accidental.

“I really believe he made some pretty good mental adjustments around the All-Star break that are sustainable,” he said.

Sustainable. That’s the key word.

Because if Rodríguez can eliminate — or even reduce — the early-season lag that has marked his first few years, the statistical explosion could be seismic. We are not talking about marginal gains. We are talking about MVP-caliber production from Opening Day through September.

So what’s behind the slow starts?

Morosi points to pitch selection and recognition — the subtle, neurological chess match between hitter and pitcher that separates stars from legends.

“On some level, he doesn’t always make the best swing decisions early when he hasn’t been going well,” Morosi explained. “For some hitters, it takes volume — tracking and seeing so many pitches — for their eyes and their processing to fully lock in.”

In other words, Rodríguez might simply need reps. Data. Memory. The invisible catalog great hitters build over time.

“He’s still building that mental notes file,” Morosi said.

That phrase hangs heavy. Because when that file is complete — when experience meets talent at full force — the leap can be dramatic. Think of Albert Pujols in his prime. Think of Miguel Cabrera at his peak. Those hitters didn’t just react. They anticipated. They seemed to know how pitchers would attack them before the ball ever left the hand.

Rodríguez is still developing that sixth sense. But the tools? They’re already there. The speed. The power. The arm. The charisma. The postseason hunger. Few players in baseball combine athletic explosiveness with marketable star presence the way he does. When he’s locked in, he doesn’t just impact games — he dictates them.

And that’s what makes Morosi’s declaration so explosive.

If this truly is the year Rodríguez “opens up,” then the Mariners’ ceiling shifts dramatically. An offense that has often searched for consistency suddenly has a potential top-five hitter in baseball from wire to wire. A team that has flirted with contention could become something far more dangerous.

The American League has been warned before. They’ve seen the second-half surges. They’ve felt the late-season damage. But a fully realized, season-long prime version of Julio Rodríguez? That’s different.

That’s terrifying.

At 25, most players are still figuring out who they are. Rodríguez has already built a career many veterans would envy. Now, he stands on the edge of something bigger — not just sustained excellence, but dominance.

If Morosi is right, we are about to witness the transformation from superstar to franchise-defining force. And if the early months of this season look anything like his typical second halves, the MVP conversation may not wait until July to begin.

The prime years aren’t coming.

They might already be here.