Mount Martha Mariners was one of 16 clubs from Australia that had teams playing during MESC Soccer 7s 2020. They participated with one team in Boys 9 (born 2011).

In addition to Mount Martha Mariners, 3 other teams played in Boys 9 (born 2011).

Mount Martha Mariners comes from Mornington which lies approximately 6 km from Mt Eliza, where MESC Soccer 7s takes place. The area around Mornington does also provide 14 additional clubs participating during MESC Soccer 7s 2020 (Among others: Bayside/Southern, Mount Eliza, Mount Martha, Mornington, Aspendale Stingrays, Woodleigh, Langwarrin, Class on Grass, Peninsula Strikers and MSC/MMSC/Langwarrin).