On May 13, 2015 — Last year’s AL Cy Young Award winner, Corey Kluber of the Indians, finally gets his first win of the year after starting off 0-5. He strikes out 18 Cardinals batters and allows only one hit over 8 innings to lead Cleveland to a 2 – 0 win. The 18 strikeouts tie a club record set by Bob Feller in 1938 and are the most by any American League pitcher since Roger Clemens also struck out 18 in 1998.

Source:
Baseball Reference May 13