Dante Bichette, Dave Winfield and Brian Downing each homer twice in the California Angels’ 8 – 7 win over the Toronto Blue Jays. This is the 8th time three teammates have done this in the major leagues.

On July 14, 1990 Dante Bichette, Dave Winfield and Brian Downing each homer twice in the California Angels’ 8 – 7 win over the Toronto Blue Jays. This is the 8th time three teammates have done this in the major leagues.

Source
Baseball Reference July 14