At the beginning of the 2016–2017 season Mystic River became a full member of the ARP, making it through to the Eastern Division finals. However, they were knocked out by NYAC 14–24.
At the start of the 2016–2017 season Mystic River became a full member of the ARP, advancing to the Eastern Division finals. However, their run was cut short by NYAC in a decisive loss.