On October 2, 2018, the Burlington Herd were approved to relocate to Welland, and rebranded as the
Welland Jackfish. In their first year in Welland, the Jackfish set their best regular season record in franchise history with a 19–17 record, and earned their first playoff series victory defeating the
London Majors 4-1. Their second campaign in the Rose City saw the Jackfish finish 15–15 in a condensed 30-game 2021 season. They were swept in the first round of the playoffs. During the 2023 season, the Jackfish won their first League Pennant in franchise history finishing with a 31-11 record. They carried this momentum into the Dominico Cup playoffs and on September 16, 2023, the Jackfish clinched their first Dominico Cup title in franchise history defeating the
Barrie Baycats 4-2 in the best-of-seven series. In front of a sellout crowd of 3,248 fans at ‘The Pond' aka
Welland Stadium, the Jackfish captured its second Dominico Cup in three years defeating the
Barrie Baycats 4-1 in the best-of-seven series. ==2026 Roster==