PEORIA, Ariz. -- The Mariners have made quite a few subtractions in volume to their prospect pool over the past 12 months, notably as chips for their bolder trades to bolster the Major League roster.
Yet for all of those diligent deals, they haven’t dwindled the farm system’s standing as one of the best in the sport.
The Mariners have six prospects among MLB Pipeline’s Top 100 this year, which is tied for the Majors' lead -- even after trading switch-pitcher Jurrangelo Cijntje last month when they were standing alone atop the leaderboard with seven.
While this era has been mostly defined by hitters following the graduations of homegrown arms Logan Gilbert, George Kirby, Bryce Miller and Bryan Woo in recent years, there are two arms near the top of Seattle’s Top 30 who could represent the next wave of pitching dominance.
That’d be Kade Anderson and Ryan Sloan, who’ve wowed in Spring Training to put further backing to the front office’s assertion that they could be in the Majors this season. The same goes for Colt Emerson, who’s seen as many reps as any position player in camp.
COMPLETE MARINERS PROSPECT COVERAGE
Here’s a look at the Mariners’ top prospects:
1. Colt Emerson, SS (MLB No. 9)
2. Kade Anderson, LHP (MLB No. 21)
3. Ryan Sloan, RHP (MLB No. 33)
4. Lazaro Montes, OF (MLB No. 43)
5. Michael Arroyo, INF (MLB No. 67)
Complete Top 30 list »
Biggest jump/fall
Here are the players whose ranks changed the most from the 2025 preseason list to the 2026 preseason list:
Jump: Jared Sundstrom, OF (2025: 25 | 2026: 17)
Sundstrom's athleticism and defensive flexibility give him a chance to log innings at all three outfield spots, enhancing his overall value while supplying right-handed pop in a reserve role. A jump to Double-A Arkansas last year brought its share of obstacles, particularly in a ballpark that doesn’t do hitters many favors, but evaluators remain encouraged by his knack for influencing games through a blend of power, speed and a poised, disciplined approach in the batter’s box.
Fall: Kendry Martínez, SS (2025: 20 | 2026: 28)
Martínez will look to turn the page in 2026. He entered pro ball regarded as a relatively high-floor bat thanks to his advanced feel for contact, but that reputation didn’t translate during his time in the Dominican Summer League. Scouts had praised his compact, quick left-handed swing and his ability to stay short to the baseball with a contact-oriented setup, yet he struggled to establish a steady plan at the plate in his debut. With physical projection remaining and the likelihood of added strength as he fills out, the organization remains hopeful that more impact will surface as his body and approach continue to develop.
More from MLB Pipeline:
• Top 100 prospects | Stats | Video | Podcast | Complete coverage
Best tools
Players are graded on a 20-80 scouting scale for future tools -- 20-30 is well below average, 40 is below average, 50 is average, 60 is plus and 70-80 is well above average. Players in parentheses have the same grade.
Hit: 65 -- Colt Emerson
Power: 65 -- Lazaro Montes
Run: 70 -- Jonny Farmelo
Arm: 65 -- Yorger Bautista
Defense: 60 -- Felnin Celesten (Rhylan Thomas)
Fastball: 60 -- Kade Anderson (Ryan Sloan)
Curveball: 60 -- Mason Peters
Slider: 55 -- Anderson (Sloan, Griffin Hugus, Robinson Ortiz)
Changeup: 60 -- Anderson (Sloan)
Control: 55 -- Anderson (Marcelo Perez, Chia-Shi Shen, Sloan)
How they were built
Draft: 19 | International: 9 | Trade: 2 | Waivers: 0 | Rule 5: 0
Breakdown by ETA
2026: 10 | 2027: 3 | 2028: 12 | 2029: 2 | 2030: 1 | 2031: 2
Breakdown by position
C: 1 | 1B: 0 | 2B: 2 | 3B: 0 | SS: 3 | OF: 9 | RHP: 11 | LHP: 3