The Chicago Cubs by YuC

Question 7

On June 15, 1964, the Cubs and Cardinals completed a trade that, at the time, was thought to be a steal in favor of the Cubs, but has gone down as one of the most lopsided trades in history in favor of the Cardinals. Lou Brock, along with two other players, was sent to the Cardinals, where he would go on to a Hall-of-Fame career. WHAT PITCHER, who only lasted another two years in the league, did the Cubs most famously receive in that trade?

Ernest Broglio