What happened: Casemiro's free transfer is official, and the 34-year-old has begun his MLS tenure. He played the full 90 minutes in his league debut.
Why it matters: The move brings a five-time UEFA Champions League winner into MLS. The contract option could keep him in the league until age 37.
By the numbers: Casemiro played 90 minutes in a 1-0 victory on his MLS debut.
What to watch: His next appearances will show whether he retains a starting midfield role.