two-seam fastball

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Definition of two-seam fastball in English English dictionary

two-seam fastball
A pitch thrown with a grip in the "horseshoe" orientation of the ball, with the rotation at a slight angle resulting in less Magnus effect as compared to a four-seam fastball since only two of the ball's seams cross the flight path; the pitch is delivered with a similar velocity as a four-seam fastball, but has a degree of sink

His two-seamer has a heavy sink and keeps the infielders busy.

two-seam fastballs
plural form of two-seam fastball