
Speaking with George Kiseda of The Pittsburgh Sun Telegraph in late July or early August 1957, reproduced in "Frustration in the Fifties" https://books.google.com/books?id=03XsO25A3I8C&pg=PA63&lpg=PA63&dq=%22I+won't+come+back+to+spring+training%22&source=bl&ots=xfn30GlAmb&sig=9pGIiE3gGIwAp6QroqRbNPygCjM&hl=en&sa=X&ved=0ahUKEwjo37rStb7NAhWGdT4KHSxjDCcQ6AEIFDAA#v=onepage&q&f=false, from Roberto Clemente: The Great One (1997) by Bruce Markusen, p. 63
Baseball-related, <big><big>1950s</big></big>, <big>1957</big>