A key position player, Bywater missed many games early in his career due to his war service.[3] He made just two appearances from 1942 to 1945.[4] During the 1946 season, in July, Bywater announced his retirement, due to heart problems.[5] He however returned the following year and in what was his first full season came within five votes of winning the 1947 Brownlow Medal, finishing equal third [4] and was runner up to Bill Williams in the 1947 club best and fairest award.[6]
As a result of a broken ankle, Bywater was out of action for much of the 1948 season.[7] He was used up forward in 1949 and kicked 25 goals from his 16 appearances.[4] Only Dick Jones kicked more goals for South Melbourne that year.
Bywater left South Melbourne midway through the 1950 season and joined Corowa, a club which he would later coach? He was reunited with former teammate Billy King, the then captain-coach. [8]