In a meeting of the two teams sporting the best records in the majors, Kansas City defeats St. Louis, 5 – 0, in the first game of an interleague series. Kendry Morales homers twice and drives in all five runs to bring his RBI total for the season to 37, most in the American League. Chris Young improves to 4-0.

On May 22, 2015 — In a meeting of the two teams sporting the best records in the majors, Kansas City defeats St. Louis, 5 – 0, in the first game of an interleague series. Kendry Morales homers twice and drives in all five runs to bring his RBI total for the season to 37, most in the American League. Chris Young improves to 4-0.

Source:
Baseball Reference May 22