Mariners promote top prospect Colt Emerson, set for MLB debut
The Seattle Mariners are promoting top prospect Colt Emerson to the major leagues, the team announced Sunday afternoon.
The 20-year-old infielder will bat ninth and make his MLB debut in Sunday’s series finale with the San Diego Padres at T-Mobile Park. First pitch is scheduled for 4:20 p.m. on NBC’s Sunday Night Baseball.
Emerson, considered the No. 6 prospect in MLB, was scratched from Triple-A Tacoma’s lineup and recalled from the Rainiers. He becomes the youngest Mariners player to make their major league debut since Felix Hernandez in 2005 (19 years old).
Emerson appeared in 38 games with the Rainiers this season, batting .255 (37-for-145) with seven home runs and 26 RBI.
“(The Mariners) preach exactly that — being consistent as a player,” Emerson told The News Tribune in March. “Just be a good teammate, and do things that help the team win. If you do that every day, you’re going to be a successful player at the end of the day.”
Emerson signed an eight-year, $95 million contract extension with the Mariners on March 31, a record figure for a player yet to make their major league debut.
In a corresponding roster move, Seattle placed infielder Brendan Donovan on the 10-day injured list (retroactive to May 16) with a left groin muscle strain — the latest in a series of injuries to key contributors (Cal Raleigh, Matt Brash, Gabe Speier).
Emerson was already in full uniform at Cheney Stadium when the Rainiers informed him of his call-up, prompting a quick drive up Interstate 5. He slots into Donovan’s role at third base for Sunday’s finale in Seattle.
Seattle selected the left-handed hitting Emerson in the first round (22nd overall) of the 2023 MLB Draft. The potential infield cornerstone joins the likes of Raleigh, Julio Rodriguez, Logan Gilbert and Bryan Woo on a long list of homegrown players drafted by the Mariners.
EMERSON DRAWS WALK IN MLB DEBUT
Emerson went 0-for-2 with a walk in his major league debut at T-Mobile Park, lifting a pair of flyouts to right field in Sunday’s 8-3 loss to the San Diego Padres.
Seattle’s top prospect was notified of his call-up minutes before Triple-A Tacoma’s game at Cheney Stadium, swapping uniforms and clubhouses amid a whirlwind afternoon.
“Honestly, it probably was for the best. I didn’t have time to think about, ‘Oh, this is my debut,’” Emerson said Sunday night. “It sucks that we didn’t get a win, but we fought.
“At the end of the day, this is a very special day for me. A special day for my family, a special day for everybody who’s been along with me. I wanted to soak (it) in as much as possible. … It’s the first of many days.
“Coming into the clubhouse, the guys were great to me. This is a really special group here, and I’m just happy to be a part of it.”
This story was originally published May 17, 2026 at 2:47 PM with the headline "Mariners promote top prospect Colt Emerson, set for MLB debut."
