Christian Arroyo, 21, and Bronson Arroyo, 40, are not related, but both are graduates of Hernando High School in Brooksville, Fla.
Bronson Arroyo fired an 84.7 mph fastball on his second pitch to Christian Arroyo, who clubbed it 106.5 mph the other way, the ball landing in the seats in left-center field. It was Christian Arroyo's third homer of his rookie season.
According to Statcast™, Arroyo's homer was the hardest-hit and farthest-hit (406 feet) ball of his young big league career.
Christian Arroyo told reporters before the game that he met Bronson Arroyo while still in high school and considers him a friend.