No. 1 prospect Emerson 'will contribute heavily' to '26 Mariners -- but where?

SEATTLE -- Colt Emerson's path to the Majors in 2026 was already a matter of sooner than later.

And now that MLB Pipeline’s No. 7 overall prospect has locked up a $95 million contract extension with the Mariners through at least 2033 -- and been added to the 40-man roster -- all eyes will be on when that’ll happen.

"He will contribute heavily to this season,” Mariners president of baseball operations Jerry Dipoto said. “And I thought that was the case before we signed him.”

There’s still so much to unpack from this unprecedented deal -- the richest ever for a player yet to reach the Majors -- and Dipoto shed some light on a few of those unanswered questions prior to the Mariners' 5-0 loss to the Yankees on Tuesday.

When could Emerson debut?

“We're going to find out,” Dipoto said. “Like I told him today, we have no hard date. We had no plan as to, if we get this done -- it's tomorrow, it's next week, or it's even this month. But I suspect that he will be a big leaguer sooner than later.”

Emerson is off to a hot start at Triple-A Tacoma, but he’ll remain there for now -- and possibly a little while longer. He’s only 20 years old and entered this season with just 40 games of experience above High-A ball.

Specifically, the Mariners want to expose him to more advanced left-handed pitching, and the Pacific Coast League is an environment in which he’ll face such arms with big league experience.

Over his first two seasons in the Minors, Emerson hit .273 with a .769 OPS against lefties -- decent numbers, which dovetails into Dipoto’s assertion that it’ll be more about reps than production. And Emerson’s first homer in the Rainiers’ season opener was against a lefty.

"Once he checks that box, there's a real chance that he's helping the day after,” Dipoto said, “because he's pretty special kid, and I think everybody in that clubhouse believes he belongs there.”

A good guesstimate that this is a matter of weeks and not months.

Where will he play?

Though Emerson has been brought up as a shortstop, he’s plenty familiar with second and third base and will likely be used most at third in Seattle in 2026. It’s why the Mariners started him there for five of his 18 Cactus League games.

That would then move Brendan Donovan into more of a utility role.

"Donnie's versatility made it such a priority for us to acquire him,” Dipoto said, “because he allowed us to do a lot of creative things with the other players on the field.

Donovan has acknowledged some growing pains by moving to the hot corner more full time, after primarily playing second base in St. Louis, which is his best position. He also has experience in both corner outfield spots, though those are pretty occupied -- as is designated hitter (more on this later).

How will this impact J.P. Crawford?

It’s an uncomfortable question, because of Crawford’s clubhouse standing as Seattle’s longest-tenured player -- and one that was essentially answered for his status beyond 2026.

Crawford is in the final season of a five-year, $51 million contract and in his age-31 season. But Dipoto was adamant that the veteran will remain Seattle’s shortstop once he returns from the 10-day injured list due to right shoulder inflammation.

When the Mariners drafted Emerson out of high school, at No. 22 overall in 2023, they thought that he’d “turn into a bigger, stronger, more power-oriented hitter and move off of shortstop, probably more toward third base,” Dipoto said.

But he’s flashed all the tools to stick at the premium position long term, and this extension signals that he’ll assume that role in 2027 and beyond.

What about the rest of the roster?

This is where things are more unclear.

Once Crawford returns -- as soon as Friday in Anaheim -- there could be a roster logjam if Emerson does indeed take over third base.

Donovan won’t move to second, at least regularly, because Cole Young is playing like the first-round pick they’ve envisioned.

What about left field, where Donovan might be a superior defender to Randy Arozarena? Sure, but moving Arozarena to DH would compromise their platoon of Rob Refnyder and Dominic Canzone. It's the same situation if Donovan played right field, where Luke Raley and Victor Robles are splitting time.

This doesn’t even cover that Emerson, Donovan and Young all hit left-handed, to which Dipoto quipped, “I wish one of them hit right-handed.”

That said, for good teams, these things have a tendency of sorting themselves out.

"We'll figure out a way to blend and mix and match,” Dipoto said.