They are the youngest club participating in the Illawarra Baseball League.

This allowed the club to develop quickly and in the 2014 season, the Mariners fielded three teams in the Illawarra Senior Baseball League.

The Mariners originally played out of Fred Finch Park in Berkeley, Wollongong.

However, on 24 July 2014, the Mariners started playing at the South Nowra Soccer Complex, which is an exclusive baseball facility.

For a number of years the Mariners Juniors have trained and played on Friday evenings with the season running from October to March.