Definition of knuckleballer in US English:

knuckleballer

noun

Baseball
  • A pitcher who primarily throws knuckleballs.

    ‘he led the league in strikeouts as a knuckleballer’
    • ‘Unlike most knuckleballers, he is controlling the pitch with pinpoint accuracy.’
    • ‘Still, it was an amazing season for the game's greatest knuckleballer.’
    • ‘Maybe he has the answer of how to get a base hit off a knuckleballer - have a terrible swing.’
    • ‘The 37-year-old knuckleballer followed Johan Santana's no-hitter with a dazzling performance of his own.’
    • ‘Age 35 seems to regularly usher in the beginning of a career plateau of sorts for knuckleballers.’
    • ‘Lindell was a pitcher turned outfielder turned knuckleballer who continually reinvented himself.’

Pronunciation

knuckleballer

/ˈnək(ə)lˌbôlər//ˈnək(ə)lˌbɔlər/