Well, when you acquire a hitter before the trade deadline, you put in a good process, you put in the work, you put in the scouting, make a decision, and hope it pays off for the rest of the season. I think it is kind of unusual for it to pay off so quickly though.
In his first plate appearance as a Royal, former Giant Mike Yastrzemski hit a two-run homer off righty Kevin Gausman for the first Royals runs of the game, putting them in the lead early. That kind of set the tone; while obviously not every fair ball was a base hit, the Royals were smacking the ball all over the park all game.