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Every MLB Farm System's Biggest Breakout Prospect of 2026 Season

['Joel Reuter', 'Bleacher Report'] Bleacher Report - Front Page 2026-08-12 13:05:19

AL West3 of 6Chris Bernacchi/Diamond Images via Getty Images Mason PetersAthletics: OF Breyson GuedezAge: 18 | Preseason Rank: No. 24 | Current Rank: No. Houston Astros: C/1B Jason SchiavoneAge: 23 | Preseason Rank: NR | Current Rank: No. Seattle Mariners: LHP Mason PetersAge: 22 | Preseason Rank: No. Texas Rangers: LHP Dalton PenceAge: 23 | Preseason Rank: No.

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