Answer
The St. Louis Cardinals acquired Goldschmidt in a trade with the Arizona Diamondbacks during the 2018–19 offseason. The trade involved multiple players, with the Cardinals sending outfielder Luke Weaver, pitcher Carson Kelly, and infielder Andy Young to the Diamondbacks in exchange for Goldschmidt. The trade was seen as a significant move for the Cardinals, as Goldschmidt was considered one of the top first basemen in baseball.