screwballer
/ˈskruːˌbɔːlər/
noun
- A baseball pitcher who specializes in throwing a screwball, a pitch that curves in the opposite direction of a typical curveball.
- The team's star screwballer struck out three batters in a row.
- The manager brought in a left-handed screwballer to face the right-handed hitter.
- Young pitchers often struggle to become a reliable screwballer because the pitch puts stress on the arm.