Mariners Prospect Report: August 4, 2026
By Taylor Anderson ·
The Case for a No. 1 Prospect Living Up to the Billing
Kade Anderson (AA, LHP, Rank: 1) did not blow anyone away on the surface this week — 4.2 innings, two hits, no runs, two walks, four strikeouts — but that line undersells what he has been doing to Double-A hitters over the last month. Across his two July starts, he has allowed just two hits and zero earned runs over 9.2 innings with 11 strikeouts and a 0.41 WHIP. For the season, the ERA sits at 1.20 through 82.1 innings, and the strikeout total is up to 119. Those are not numbers that allow for much hedging. Anderson throws a 96-98 mph fastball with genuine riding life, a plus slider, a plus changeup with fade that neutralizes right-handed hitters, and a curveball with its own distinct movement profile, all of it delivered with 60-grade command. The stuff is real, and so far the results have matched it at every turn.
The honest question with Anderson is no longer whether he can handle Double-A; it is how quickly Seattle decides to push him to Triple-A and what his workload ceiling looks like this season given some prior injury history in the dossier. His sequencing and tunneling are already advanced for a 22-year-old, and the main in-game weakness — occasional command lapses when he reaches for extra velocity — has barely shown up in the box scores. A #2 starter projection with an all-star outcome ceiling is the current read, and nothing he has done this year argues against it. If anything, I would take the over on a #2 outcome given how consistently the full four-pitch mix has played. Anderson may already be ready, and that is probably why you heard so much chatter leading up to the deadline about Seattle moving starting pitching.
Five Doubles, Four Walks, No Drama: Caron Makes His Case at Double-A
Josh Caron (AA, C, Rank: 15) had as clean a week as a contact-limited power catcher can have: five hits, all five going for doubles, four walks, and just four strikeouts over 19 plate appearances in Arkansas. The doubles parade is a natural extension of what he has been doing over the last 30 days, slashing .293/.423/.638 with four home runs and eight doubles across 71 plate appearances at the Double-A level. The promotion from Everett came after he posted a .272/.355/.579 line with 19 home runs at A+ in 293 PA, and the transition has not slowed him down. What makes the recent stretch notable for Caron specifically is the walk rate — he drew 13 free passes in his last 30 days at Double-A against 18 strikeouts. For a catcher graded at 45 on the hit tool with a history of swing-and-miss, zone management at the jump in level is the signal that scouts want to see.
The projection still tops out in the up-and-down range given the 45 hit tool and solid-average defensive profile. But the gap between "depth option" and "legitimate backup with real offensive value" is not that wide, and this month at Arkansas has him tracking toward the better end of that band. He has 19 home runs and 23 doubles combined across both levels this year after managing only nine home runs and nine doubles in all of 2025 at A+. The power was always there; the question was always whether contact would hold. Right now, in the most important test of his career so far, it is holding.
Quick Hits
Ryan Sloan (AA, RHP, Rank: 2) · gave up two hits and nothing else over 4.2 innings, striking out five and walking one. He has not allowed an earned run across either of his last two starts — 9.2 innings, five hits, 11 punchouts — and the season ERA stands at 3.50 through 72 innings with 88 strikeouts. A 95-98 mph fastball gives him a physical margin for error that his secondaries are slowly starting to match.
Luke Stevenson (A+, C, Rank: 9) · had the three-true-outcomes version of a big week: three hits, all three home runs, four walks, a hit-by-pitch, and 10 strikeouts across 22 plate appearances. That is his 14th home run of the year, and he is slashing .284/.400/.687 over the last 30 days. The 75 walks against 102 strikeouts on the season at High-A is a patience-to-contact ratio that projects forward well for an everyday catcher who also carries a 60 arm and 55 field grade.
Luis Suisbel (A+, 3B, Rank: 13) · went 6-for-20 with a double, a triple, and two home runs, driving in three. He is slugging .662 over the past 30 days with seven home runs in 78 plate appearances, a stretch that looks nothing like the .211 average he posted across all of 2025 at the same level. Contact is still the concern — 88 strikeouts through 322 PA this year — but the power has been very real lately for a switch-hitter with a 60 arm.
Michael Arroyo (C) · collected seven hits including two doubles in 22 plate appearances, with two HBP factoring into the on-base line. He is hitting .326/.369/.522 over the last 30 days in Tacoma after a .287/.364/.456 line at Double-A through the first half of the season. The combined .299/.367/.477 line with 13 home runs across both levels at 21 years old is ahead of where his scouting profile has him landing — he is a 55 hit tool bat projecting to second base, and the upper-minors offensive adjustment has been seamless so far.
Charlie Pagliarini (AA, 3B, Rank: 40) · put up an 8-for-31 week with three doubles, six walks, and four RBI in Arkansas. His .398 OBP on the season leads the everyday regulars in this system, and the 18 home runs in 435 PA at Double-A as a 25-year-old fit the quad-A profile. Still, a .272/.398/.496 season line is not nothing, and the walk rate has been genuinely good all year.
Victor Labrada (AAA, CF, Rank: 28) · drove in two runs on three hits, adding a pair of home runs and three walks across 19 plate appearances. The two home runs stand out for a player graded at 30 on power, and he is slashing .292/.379/.563 over his last 15 games. That hot stretch has nudged the season line to .259/.359/.392 across 91 games in Tacoma, better than his 2025 numbers at the same level while maintaining 14 stolen bases. The speed and defense are the carrying tools here, but any sustained extra-base production makes him a more credible roster option.
Colton Shaw (A+, RHP, Rank: 21) · worked five innings, allowing four hits and two earned runs with a walk and four strikeouts. The start was his best over the last 30 days — he has allowed 13 earned runs across 15 innings in that stretch — and the season ERA sits at 4.62 through 85.2 innings. Shaw is a strike-thrower with a 92-94 mph fastball and a 55 command grade, projecting as a back-end starter, but the secondaries need to sharpen before upper-level hitters start sitting on the heater.