Complex sentence: The Yankees view Núñez as a possible replacement at shortstop for Jeter; though they were willing to trade Jesús Montero, their top hitting prospect, the Yankees considered Núñez untouchable in trade negotiations.
Split into simpler sentences: The Yankees view Núñez as a possible replacement at shortstop for Jeter. Though they were willing to trade Jesús Montero, their top hitting prospect, the Yankees considered Núñez untouchable in trade negotiations.