Midfielder signs a one-year deal with extension option League investigation centers on the transfer Inter Miami have signed Casemiro as a free agent, but Major League Soccer is investigating the South Florida side for potential tampering in the process of acquiring the Brazilian midfielder. Casemiro has signed what amounts to a one-year contract with Miami, beginning now and ending at the conclusion of the 2027 “sprint season” that precedes the league’s switch to a fall-to-spring calendar in 20…