Four home runs in a row by consecutive batters has only occurred nine times in the history of Major League Baseball. Following convention, this is called back-to-back-to-back-to-back. The most recent occurrence was on July 27, 2017, when the Washington Nationals hit four in a row against the Milwaukee Brewers in Nationals Park as Brian Goodwin (baseball) , Wilmer Difo , Bryce Harper and Ryan Zimmerman homered off pitcher Michael Blazek . Blazek became the fourth pitcher to surrender back-to-back-to-back-to-back home runs, following Paul Foytack on July 31, 1963, Chase Wright on April 22, 2007, and Dave Bush .
Alex Rodriguez is the youngest player in history to hit 600 home runs; he did so at 35 years, 8 days old. A-Rod is also the youngest player in American League history to hit 600 homers. Hank Aaron is the youngest 600 home run hitter in National League history; he did so at the age of 37 years, 80 days old. Jim Thome is the oldest player in MLB history to hit 600 homers, finally reaching the mark at 40 years, 353 days old. The quickest player in Major League history to hit 600 home runs is Babe Ruth ; he hit his 600th homer in his 2,044th game and his 6,821st at-bat. The Babe also holds the record in the American League for both categories. Barry Bonds was the quickest National League player in history to reach 600 home runs; he did so in his 2,395th game and his 8,211th at-bat. Hank Aaron took the longest time in history to hit 600 home runs; he reached the mark in his 2,592nd game and his 10,009th at bat.