Andre Dawson sets a major-league record when he is intentionally walked five times during a 16-inning, 2 – 1 Cubs win over the Reds. Cincinnati issues seven intentional passes altogether to tie a major-league record set by Houston in 1984.

On May 22, 1990 — Andre Dawson sets a major-league record when he is intentionally walked five times during a 16-inning, 2 – 1 Cubs win over the Reds. Cincinnati issues seven intentional passes altogether to tie a major-league record set by Houston in 1984.

Source:
Baseball Reference May 22