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Use "knuckleballs" in a sentence
"So going up there and seeing guys I've never seen, especially against relievers and closers -- they're going to come at you with sliders, knuckleballs, split-fingers, you know, everything they have in their kitchen sink."
"Dickey's 79-mph knuckleballs danced enough to fool most Yankee hitters, though Mark Teixeira figured him out well enough to force a 3-1 count, then slammed Dickey's pedestrian fastball into the right-field seats to give the Yankees a 1-0 lead."
"Then they ran into the knuckleballs of R.A. Dickey, and the streak was no more."