Inter Miami have signed Brazilian midfielder Casemiro as a free agent, but Major League Soccer has opened an investigation into the South Florida club for potential tampering during the acquisition process. The move adds another marquee name to a squad already featuring Lionel Messi, Rodrigo De Paul and Luis Suárez, but the tampering probe casts a shadow over the signing and raises questions about how the deal was struck.

Casemiro has signed effectively a one-year contract running through the 2027 "sprint season" ahead of MLS's switch to a fall-to-spring calendar, with an option to extend to 2028-29. Inter Miami and the LA Galaxy reached a settlement over the "discovery rights" needed to sign him, though the financial terms will only be disclosed once the investigation concludes, and MLS has not clarified whether the tampering allegation relates to direct talks with Casemiro or to how the discovery rights were obtained. The 34-year-old, a five-time Champions League winner with Real Madrid who also spent four seasons at Manchester United, recently featured for Brazil at the 2026 World Cup before their last-16 exit to Norway.