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Unlike the straight trajectory of the four-seam fastball, a two-seam fastball, often referred to as a sinker, moves downward or towards the pitcher's arm side. This pitch can sometimes confuse viewers as terminology may differ. Some fans may reserve the term 'sinker' for pitches that drop significantly, whereas others use 'two-seamer' indiscriminately.
Cutter
The cutter is less common among MLB pitchers but is characterized by its late and sharp movement towards the pitcher's glove side. Identifying a cutter can be tricky, especially since it may sometimes resemble a slider, leading to disagreements among broadcasters regarding the correct classification.