What happened: Inter Miami has officially signed Brazilian star Casemiro despite an ongoing MLS tampering investigation. The agreement secures the midfielder on a three-year contract.

Why it matters: The league opened an inquiry into the acquisition over suspicions the deal was conducted illegally. Casemiro recently noted he previously spoke with the LA Galaxy but remained focused on joining the Florida club.

What to watch: The resolution of the league's tampering investigation will determine if any sanctions apply.