
Here’s a three-paragraph write-up on the news:
The Toronto Blue Jays have officially signed Seojun Moon (also spelled Moon Seo-joon), an 18-year-old right-handed pitching prospect from South Korea. He hails from Jangchung High School in Seoul, where over his high school career he posted a 2.18 ERA across 66 innings, struck out 93 batters, and notably never allowed a home run.
Moon’s repertoire already includes a fastball (frequently in the mid-90s km/h range) along with a slider, curve, changeup, and two-seam fastball, offering the Blue Jays a diverse set of tools to work with as he develops. This signing is especially historic for Toronto: Moon becomes the first Korean-born international amateur signing in Blue Jays franchise history.
Financial details were not fully disclosed by the club, but Moon’s agency stated the signing bonus was $1.5 million USD. The deal marks a strategic move by Toronto, especially after having acquired additional international bonus pool flexibility earlier in the offseason. As a young arm with high ceiling, Moon will likely begin his professional journey in the lower minor league levels, where the Blue Jays will look to refine his skills and monitor his progression toward a potential major league future.
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