Seattle U’s tall lefty Duncan Bos brings pro-style velo and spin upside
Duncan Bos is a 2026 freshman left-handed pitcher at Seattle U, listed at 6'1 and 215 pounds, with a fastball that has been measured up to 86.6 mph and a slider around 74.4–76.0 mph, plus solid spin rates that hint at real pitch quality rather than just arm strength[2][4][8]. He looks like a fit for teams that value a sturdy, attack-the-zone lefty with pitchability upside and room to grow into more velocity; the main question is how quickly the stuff translates against college hitters in the 2026 season[1][2].
