Definition of knuckleballer in English:
 knuckleballer
nounˈnʌk(ə)lbɔːləˈnək(ə)lˌbɔlər
Baseball A pitcher whose pitching style largely involves throwing knuckleballs.
 he led the league in strikeouts as a knuckleballer
 Example sentencesExamples
-  Maybe he has the answer of how to get a base hit off a knuckleballer - have a terrible swing.
 -  Still, it was an amazing season for the game's greatest knuckleballer.
 -  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.
 -  Unlike most knuckleballers, he is controlling the pitch with pinpoint accuracy.
 
  Definition of knuckleballer in US English:
 knuckleballer
nounˈnək(ə)lˌbôlərˈnək(ə)lˌbɔlər
Baseball A pitcher who primarily throws knuckleballs.
 he led the league in strikeouts as a knuckleballer
 Example sentencesExamples
-  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.