Central Coast Mariners coach Mark Jackson has revealed the reason behind his shock exit from the club, citing a difficult working relationship with certain individuals. Jackson, who led the Mariners to a treble-winning season in 2023-24, departed the club on the eve of the 2025-26 season. In an interview with Football360, Jackson stated that he was told in no uncertain terms that his future at the club would be difficult, and that he had no desire to jump ship. Jackson had committed to the Mariners and had built good relationships with the players, but ultimately decided that it was best for both parties that he leave. The Mariners had a tumultuous pre-season, with high-profile player departures and uncertainty over the club's future. Jackson's exit was announced seven days before a blockbuster F3 Derby against Newcastle Jets in Round 1. The Mariners have since appointed a new coach, and are looking to rebuild for the upcoming season.