SI.com:
Story has an an opt-out after four years. The Red Sox can keep him for a seventh season, which would make the contract $160 million over the seven years.
Sportrac:
https://www.spotrac.com/mlb/boston-red-sox/trevor-story-18377/
Trevor Story signed a 6 year / $140,000,000 contract with the Boston Red Sox, including $140,000,000 guaranteed, and an annual average salary of $23,333,333.
Player opt-out available after 2025 ($5M buyout)
If Story opts-out, the team can opt back in, adding a 7th year (2028)
Joel Sherman:
@Joelsherman1
Trevor Story’s contract does not contain no trade provisions #RedSox