Chicago Cubs P Bill Hands strikes out for the 14th straight at bat in the Cubs’ 2 – 0 win in the nightcap of a doubleheader at New York. The 14 strikeouts in consecutive at-bats (as opposed to plate appearances) are a major league record.

On July 11, 1968Chicago Cubs P Bill Hands strikes out for the 14th straight at bat in the Cubs’ 2 – 0 win in the nightcap of a doubleheader at New York. The 14 strikeouts in consecutive at-bats (as opposed to plate appearances) are a major league record.

Source
Baseball Reference July 11