Milwaukee 3B Don Money commits a 1st-inning error in a 10 – 5 loss to Minnesota, ending his perfect defensive season after 86 games and 257 chances. At this point, Money holds both the National League and American League records for most consecutive chances without an error in a season.

On July 17, 1974 Milwaukee 3B Don Money commits a 1st-inning error in a 10 – 5 loss to Minnesota, ending his perfect defensive season after 86 games and 257 chances. At this point, Money holds both the National League and American League records for most consecutive chances without an error in a season.

Source
Baseball Reference July 17