Red Sox prospect piled up strikeouts with ‘old four-seamer,’ two sliders
Red Sox left-handed pitching prospect Hayden Mullins said he tried to add a two-seam fastball to his pitch mix “for the longest time.”“For some reason I cannot get it to move,” Mullins said, laughing. “So we just stick to the old four-seamer.”The old four-seam fastball...