Why would Casemiro miss 4 games not 3 after Premier League red card?

Following a straight red card in the premier league fixture against Southampton on Sunday, March 12, 2023, Manchester United and Brazil’s midfielder Casemiro is set to miss four games instead of the three games associated with a red card.

Fans have been confused as to why it is four this time around and not three games, and it is four because this is Casemiro’s second straight red card in the premier league, and it is mandated according to the English FA laws.