Colt Emerson

Colt Emerson

20-Year-Old ShortstopSS
Seattle Mariners AAA
Day-To-Day
Injury Wrist
2026 Fantasy Outlook
Barring a surprise offseason move, Emerson has a real chance to be the Mariners' starting third baseman as early as Opening Day. He has always been young for his levels while projecting for at least above-average power and with at least above-average hitting ability. His run in the second half of 2025 was perhaps his most impressive stretch to date, slashing .307/.405/.515 with nine home runs, nine steals (on 11 attempts), an 11.3 percent walk rate and a 17.5 percent strikeout rate in 59 games across High-A, Double-A and Triple-A. He wasn't at Triple-A long (just six games), but Emerson logged a 64.7 HardHit%, 35.3 percent line-drive rate and 174 wRC+. The lefty-hitting Emerson doesn't turn 21 until after the All-Star break, so while he isn't an elite athlete, he's a legitimate hitting phenom and could end up with a plus hit tool and plus power. A shortstop by trade, Emerson will add third base eligibility shortly after his big-league debut, which is a nice bonus. Read Past Outlooks
RANKS
Rest of Season From Preseason
#404
ADP
Signed an eight-year, $95 million contract extension with the Mariners in March of 2026.
Nursing wrist injury at Triple-A
SSSeattle Mariners  AAA
Wrist
April 20, 2026
The Mariners declined to recall Emerson from Triple-A Tacoma to take Brendan Donovan's (groin) roster spot in part because Emerson has been dealing with a wrist injury, Adam Jude of The Seattle Times reports.
Analysis
Emerson homered in his last game for Tacoma on Saturday but did not play in Sunday's contest. It's unclear if the top prospect will miss any additional time. The timing of the injury is unfortunate, although the Mariners might have decided against promoting Emerson even if he was healthy, as Donovan's absence is not expected to last long. Signed to an eight-year, $95 million contract extension in late March, Emerson is slashing .258/.361/.452 with two homers and six stolen bases in his first 73 plate appearances with Tacoma. The 20-year-old has a good chance to make his major-league debut in the first half, but for now he'll focus on getting healthy and returning to the Rainiers' lineup.
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Minor League Left/Right Batting Splits (AAA)
Since 2024
 
 
+21%
OPS vs LHP
2026
 
 
+11%
OPS vs LHP
2025
 
 
+270%
OPS vs LHP
2024
No Stats
OPS PA R HR RBI SB AVG OBP SLG
Since 2024vs Left .969 37 4 11 .226 .324 .645
Since 2024vs Right .800 66 0 5 .291 .400 .400
2026vs Left .647 30 2 4 .160 8.033 .440
2026vs Right .585 46 0 3 .282 16.022 .385
2025vs Left 2.310 7 2 7 .500 3.000 1.500
2025vs Right .625 20 0 2 .313 8.050 .438
2024vs Left 0 0 0 0 0 0 0 0 0
2024vs Right 0 0 0 0 0 0 0 0 0
Prospect Rankings History
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Recent RotoWire Articles Featuring Colt Emerson See More
Recent RotoWire Articles Featuring Colt Emerson See More
Past Fantasy Outlooks
2025
2024
Emerson is a really good pure hitter, but the rest of the overall fantasy package is to be determined. He walked more (18.1 BB%) than he struck out (14.0 K%) while hitting .293 as an 18-year-old at Single-A, and he hit .374 in 24 games in 2023 and hit .370 as one of the youngest players in the Arizona Fall League this year. Emerson struggled to a .225/.331/.317 slash line in 29 games at High-A shortly after his 19th birthday, and he missed a lot of time, especially in the first half, with a broken foot. Even amid his struggles in the Northwest League, Emerson boasted a 0.50 BB/K, so he was hardly overmatched. Emerson is a doubles maven, tallying nine doubles in 13 AFL games and 27 doubles in 94 career games in the minors, but he didn't homer in the AFL and has six homers thus far in pro ball. He hits the ball very hard (31.0 Hard%) for a teenage shortstop, but he ran groundball rates over 48 percent at Single-A and High-A last year. Emerson went 15-for-17 on stolen-base attempts in 70 games, so while he only grades as a 50-grade runner, he should be able to chip in double-digit steals early in his career. More over-the-fence power will certainly come, but it's unclear if he'll settle in as a 15-20 homer threat or a 20-30 homer threat.
The Mariners snagged three seven-figure prep hitters in the first 30 picks of the 2023 MLB Draft, and Emerson got the biggest bonus ($3.8 million) and was first off the board at No. 22 overall. A lefty-hitting shortstop, Emerson has already gained good weight since the end of his high school season, up to 6-foot-2 and around 200 pounds. He slashed .374/.496/.550 with two home runs, 10 doubles and eight steals on eight attempts in 24 games across the Arizona Complex League and the Cal League. Emerson has been billed as hit-over-power, and indeed, he had a 17.5 K% and a 14.9 BB% in his pro debut, so the hit tool easily projects as plus. Defensively, he can play shortstop but may move to third base as needed. He isn't a plus runner, but has excellent instincts and gets the most out of his physical tools. Emerson could reach the majors sometime in 2025.
More Fantasy News
Rejoins Triple-A lineup
SSSeattle Mariners  AAA
April 8, 2026
Emerson (foot) started at shortstop and went 2-for-3 with a walk, two stolen bases and an RBI on Tuesday in Triple-A Tacoma's 1-0 win over Sugar Land.
Analysis
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X-rays negative
SSSeattle Mariners  AAA
Foot
April 4, 2026
X-rays on Emerson's right foot were negative after he left the first game of Triple-A Tacoma's doubleheader against El Paso on Saturday, Daniel Kramer of MLB.com reports.
Analysis
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Early exit at Tacoma
SSSeattle Mariners  AAA
Foot
April 4, 2026
Emerson left Game 1 of Saturday's doubleheader with Triple-A Tacoma after the first inning with an apparent injury.
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Inks $95 million contract extension
SSSeattle Mariners  AAA
March 31, 2026
The Mariners signed Emerson to an eight-year, $95 million contract extension Tuesday, Robert Murray of FanSided.com reports.
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Will open season in minors
SSSeattle Mariners  AAA
March 21, 2026
The Mariners reassigned Emerson to minor-league camp Saturday.
Analysis
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