Answer: niekro

AnswerCrossword Clue
NIEKROHall of Fame pitcher since '97
NIEKROHall of Fame pitcher nicknamed "Knucksie"
NIEKROKnuckleballer Phil
NIEKROPhil who was a five-time Gold Glove winner
NIEKROBaseball Hall-of-Famer nicknamed Knucksie
NIEKROBaseball Hall-of-Famer Phil
NIEKROHall of Famer nicknamed "Knucksie"
NIEKROKnuckleball pitcher Phil