Complex sentence: Garrett played in the first Test match, against Lillywhite's team in Melbourne in March 1877, and at 18 years and 232 days is still the youngest representative to play for Australia against England.
Split into simpler sentences: Garrett played in the first Test match, against Lillywhite's team in Melbourne in March 1877. At 18 years and 232 days is still the youngest representative to play for Australia against England.