This set up a final against Scarborough Athletic to be held at Throstle Nest, home of Farsley Celtic. Marine struggled in the match with Hessey dropping himself to the bench in place of defender Liam Willis who became captain in place of the unavailable Andy Nicholas. Going 0–1 down in the 58th minute, it wasn't until the player-manager subbed himself on for Willis in the 80th minute that Marine looked dangerous. The defender taking a free-kick which was headed in by Warren Bellew in the 87th minute. At 1–1, the game looking destined for penalties, was turned on its head in the fourth minute of added time as that season's highest club goalscorer Danny Mitchley curled in an effort from the edge of the box to win the game for Marine. This was the fourth time that Marine FC have won the league cup, a record for this competition. Towards the end of a dismal 2016–17 season. Hessey left the club and was replaced by Tommy Lawson. A mass walk-out of players didn't help Lawson but he managed to assemble a squad at short notice. He then guided the club away from the relegation zone after 5 wins in 11 games. Marine finished in 18th place in the table. The 2017–18 season was once again a disappointment with Marine unable to improve on the previous campaign and ended up finishing in 19th place in the table. Very poor home form once again saw the Mariners win only 6 of their 23 league games at Rossett Park. However the team did do well in the cups reaching the final of the Liverpool Senior Cup. Home advantage at Marine didn't help and 750 fans saw them well and truly beaten 4–0 by Prescot Cables. They also went on a decent run in the FA Trophy beating Whitby Town and Atherton Collieries. They then saw off teams from the division above in FC United and Chorley before a first ever visit to Dover Athletic saw them lose 3–4 against the Conference National team. The 2018–19 season saw manager Tommy Lawson introduce a raft of new signings to the squad whilst other players left for pastures new. However, with only five games of the season played Marine found themselves second from bottom of the league. A 2–0 defeat at home to Grantham Town on 1 September proved to be a turning point with manager