The Royals acquire Reds pitching ace Johnny Cueto in a trade for three pitching prospects, Brandon Finnegan, John Lamb and Cody Reed. Cueto will prove key to the Royals winning their first World Series title in three decades.

On July 26, 2015 — The Royals acquire Reds pitching ace Johnny Cueto in a trade for three pitching prospects, Brandon Finnegan, John Lamb and Cody Reed. Cueto will prove key to the Royals winning their first World Series title in three decades.

Source:
Baseball Reference July 26