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# Juan Rijo — Mariners Prospect Profile
- URL: https://baseballthings.com/juan-rijo-mariners-prospect-profile/
- Published: 2026-08-18T03:38:00.000Z
- Updated: 2026-09-29T06:58:55.000Z
- Description: Mariners outfielder, No. 11 in the September 2026 rankings. Scouting reports, development notes and level-by-level analysis from Jason A. Churchill.
- Author: Jason A. Churchill
- Tags: Juan Rijo

Rijo is the best hitting prospect on the Mariners' DSL club — and it's not close, or surprising. He has shown a little more whiff than one might have expected, but he's also shown patience, a consistent line-drive swing, and a chance at 20-homer power.

The "not close" part holds up against the obvious comparison. Rijo and Gregory Pio played on the same Dominican Summer League club and took nearly identical trips to the plate — 219 for Rijo, 206 for Pio. Rijo hit .310/.434/.477 with a 127 wRC+ and 20 extra-base hits. Pio hit .275/.398/.419 with a 106 wRC+ and 15\. Rijo was better in every slash component, and 21 points of wRC+ is not a rounding error at that sample.

The on-base performance was close to uninterrupted. He reached base in 47 of his 51 games, and the season opened with a 26-game on-base streak that ran from June 1 all the way to July 9 — more than half the schedule before he was held off the bases twice in a row. Inside that stretch was a 10-game hitting streak from June 16 through July 2.

[Gregory Pio — Mariners Prospect ProfileMariners center fielder, No. 8 in the September 2026 rankings. Scouting reports, development notes and level-by-level analysis from Jason A. Churchill.![](https://storage.ghost.io/c/f2/85/f285ce72-40e3-409f-ae3b-2ef371936c02/content/images/size/w256h256/2026/08/BT27Logo1024width--1-.png)Baseball ThingsJason A. Churchill![](https://storage.ghost.io/c/f2/85/f285ce72-40e3-409f-ae3b-2ef371936c02/content/images/2026/09/Gregory_Pio.png)](https://baseballthings.com/gregory-pio-mariners-prospect-profile/)

The line-drive swing shows up in the shape of the damage. Of his 20 extra-base hits, 17 were doubles or triples — 14 and three — against three home runs. He also pulled just 39.7% of his batted balls, the most balanced distribution of anyone on this list. That is what the raw material for future home run power looks like in an age-17 season: contact sprayed to the whole field with carry, before the strength arrives to finish it.

The patience is real and it grew mid-season. He walked 16.4% of the time overall, and in July it reached 23.4% across 77 plate appearances.

And the whiff you mention is visible, mostly by comparison. Rijo struck out 21.9% of the time against Pio's 16.0%, with 15 games of multiple strikeouts to Pio's seven. It never became a problem — only twice all summer did he strike out three times — but he is the one of the two who gives some at-bats away.