Complex sentence: Keane is described in Jim Bouton's "Ball Four" as being prone to panic as a manager and one who was "willing to sacrifice a season to win a game" by putting injured stars into the lineup before their injuries had fully healed.
Split into simpler sentences: Keane is described in Jim Bouton's "Ball Four" as being prone to panic as a manager. He was "willing to sacrifice a season to win a game" by putting injured stars into the lineup before their injuries had fully healed.