September 28
1928 – Sir Alexander Fleming notices a bacteria-killing mold growing in his laboratory,
discovering what later became known as penicillin.
1941 – Ted Williams, playing for the Boston Red Sox
in a doubleheader against the Philadelphia Phillies on the final day of the season, gets six hits in eight appearances at the plate, resulting in
.406 batting average for the year, and became the last major league player to bat .400 in a season.