Ken Griffey Jr of the Cincinnati Reds became the youngest player in US major league baseball history to hit 400 home runs, connecting today in the fourth innings against the Colorado Rockies at Coors Field in Denver.
Griffey sent a 2-0 pitch from Cuba's Rolando Arrojo into the left-field seats, a 378-foot drive. It was his second homer of the season and second in as many days.
He was cheered by the Coors Field crowd and hugged by teammates in the dugout.
At 30 years, 141 days, Griffey beat the previous mark, set by Jimmie Foxx, who was 30 years, 248 days old.
Griffey's historic homer came on the 50th birthday of his father, Ken Griffey Sr It was the fourth time he has homered on his father's birthday.