This story was excerpted from Daniel Kramer’s Mariners Beat newsletter. To read the full newsletter, click here. And subscribe to get it regularly in your inbox.
SEATTLE -- Now that Colt Emerson is officially in The Show, the Mariners anticipate this being a long-term stay for their highly anticipated face of the future.
Even if it came in a hurried fashion on Sunday afternoon and to account for an ongoing injury to Brendan Donovan that’s become even more concerning than it already was.
“There is no perfect time,” Mariners general manager Justin Hollander said. “He's ready.”
Here’s what things will look like for both the club and MLB Pipeline’s No. 6 overall prospect:
Playing time forecast
As expected even before Donovan suffered a left groin strain, Emerson is here to play third base, and on most days.
“It’s certainly not going to be in a true platoon or anything like that,” Hollander said. “Whether it’s every day or not, we’ll still find ways to get him a day off his feet.”
Emerson has grown up as a shortstop and flashed plus defense at the premium position to stick there long term. But he’ll only play there sparingly in 2026, as the Mariners are committed to J.P. Crawford manning that spot in the final season of his five-year, $51 million contract.
Speaking of Crawford, he exited Sunday’s game after taking a 91.6 mph fastball off his left triceps from Lucas Giolito -- but Emerson did not take over the position.
Instead, Leo Rivas came off the bench to do so. And Rivas was initially in the lineup as Seattle’s third baseman, before Emerson was rushed up from Triple-A Tacoma and arrived at T-Mobile Park just two hours before first pitch.
As for matchup-based decisions for Emerson’s everyday lineup fit, such as days that the Mariners face a tough lefty, that will fall under manager Dan Wilson’s purview.
When Emerson signed a $95 million extension on March 31, the club still wanted to expose him to more left-handed pitching in the Pacific Coast League. The uptick in stuff will be massive in the big leagues, and it’s possible -- if not likely -- that the Mariners will spell the 20-year-old against some of the sport’s tougher southpaws.
For what it’s worth, Emerson had an .853 OPS vs. lefties in 52 plate appearances at Tacoma.
“I just wanted to keep developing as a winning player,” Emerson said. “Get better at baserunning, get better at stealing bags, get better at defense. Just all around, just really honing in on the winning aspects of the game, and just trying my best to be the most consistent each day.”
Expected hiccups
Even the best big leaguers went through struggles at the outset of their careers, and anticipating Emerson to be a savior to this injury-plagued roster would be unreasonable.
“There's no way of knowing with a young player,” Hollander said. “I think we expect that there'll be an adjustment period.”
Julio Rodríguez had a 37.1% K rate and zero homers in his first month. Cal Raleigh was sent back to the Minors early in his first full season. Crawford needed a change of scenery. Outside the organization, the list goes on.
“All of them had a moment where they landed in the big leagues, they had some success, the big leagues adjusted to them, and they had to adjust back,” Hollander said. “That's very normal, and that's how I expect this to go.”
Even at Tacoma, Emerson experienced challenges, though they might’ve been compounded by a left wrist issue that necessitated a cortisone shot and sidelined him for five days in late April.
Donovan’s longer-term outlook
The first order will be getting him healthy, and his IL stint is expected to be well beyond the minimum stay. Bigger picture, how Donovan navigates the residual symptoms of his offseason sports hernia surgery will remain a legitimate condition that the Mariners will monitor.
Because when he does return, it’s expected that he’ll transition into a utility role that will include time at designated hitter.
Both would come with some complications, such as how Donovan’s core area will handle more running in the outfield, and that the club already has a DH platoon between Dominic Canzone and Rob Refsnyder. That tandem has a combined .627 OPS that ranks 24th at the position, though much of that is lagged by Refsnyder’s ongoing struggles.
“The idea that of the team that we think we'll have in August or September was one that was more than just nine deep,” Hollander said, “was that guys could rotate and play different spots, that they would all be better for the idea that they could get a DH day, get an off-day, move around the field to do different things.”