He died in Las Vegas of complications from COVID-19. DeVito had been a member of the Four Seasons and its predecessors from 1954 to 1971.
https://nypost.com/2020/09/22/tommy-devito-original-four-seasons-member-dead-at-92-from-covid-19/
https://nypost.com/2020/09/22/tommy-devito-original-four-seasons-member-dead-at-92-from-covid-19/