A campaign group says the UK government must "now step in" after three Premier League clubs announced new shirt sponsorship deals with betting firms.
Burnley and Fulham have one-year deals with W88 and SBOTOP respectively. Aston Villa have a three-year deal with BK8.
In April, Premier League clubs agreed to withdraw gambling sponsorships on the front of matchday shirts by the end of the 2025-26 season.
In a statement, Big Step called the partnerships "short-sighted."
The group, which is campaigning to end gambling advertising and sponsorship in football, added: "Football can't be trusted on gambling and the government must now step in to end these deals.
"Clubs talk about mental health while desperately accepting cheques from online casinos to promote gambling - forcing their own young players and fans to be walking billboards for products that cause addiction and suicide."
In 2021, Norwich cancelled a sponsorship deal with Asia-based firm BK8 because of its provocative marketing material.
During the 2022-23 season, eight Premier League clubs had gambling companies on the front of their shirts, worth an estimated £60m per year.
As part of the decision to end gambling sponsorship on the front of shirts, clubs will still be able to continue featuring gambling brands in areas such as shirt sleeves and LED advertising after 2026.