two-seamer
n.— «One of the buzz words for the Mariners this spring and into the regular season is “two-seamer,” also known as a sinking fastball.» —“Notes: M’s staff riding two-seamer” by Doug Miller in Seattle MLB.com Apr. 7, 2006. (source: Double-Tongued Dictionary)
Further reading
Why do baseball announcers say that a pitcher who throws a high fast ball is bringing high cheese? The cheese might be related to big cheese, a term that in turn may go back to Hindi and related languages where chiz means “thing.” This...
Throwing cheese and shaky cheese are two very different things. In baseball, hard cheese refers to a powerful fastball, and probably comes from a similar-sounding word in Farsi, Urdu, and Hindi. Shaky cheese, on the other hand, is the grated...