Bill Mazeroski of the Pittsburgh Pirates plays his 392nd straight game, setting a record for National League second basemen, in an 8 – 3 loss to the Cincinnati Reds.

On May 18, 1968 — Bill Mazeroski of the Pittsburgh Pirates plays his 392nd straight game, setting a record for National League second basemen, in an 8 – 3 loss to the Cincinnati Reds.

Source:
Baseball Reference May 18