English edit

Etymology edit

knuckle +‎ -er

Pronunciation edit

  • (file)

Noun edit

knuckler (plural knucklers)

  1. (baseball slang) A knuckleball.
    • 1952, Bernard Malamud, chapter 2, in The Natural:
      Fowler flung a stiff-wrist knuckler that hung in the air without spin before it took a sudden dip, but Roy scooped it up with the stick and lifted it twenty rows up into the center field stands.

See also edit