Mets catcher Travis d’Arnaud and his brother, Chase, played against each other in the majors at the end of September. Chase, an infielder, got a late-season call-up by the Philadelphia Phillies. It was the first time they had been rivals in the big leagues. They had previously been opponents in the minors on a few occasions.
Travis is in his third major league season with the Mets, while Chase had appeared in three seasons with the Pirates before this current season with the Phillies.
Read more about the d’Arnaud brothers at the link below from Newsday: