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Bryce Harper is eighth-youngest to reach 100 home runs

Bryce Harper's 100th career home run was also his first grand slam. Brad Mills/USA TODAY Sports

Bryce Harper's 100th home run was something to remember.

At 23 years, 181 days, the Washington Nationals star became the eighth-youngest player in major league history to reach 100 home runs, Elias Sports Bureau research shows.

The youngest to reach 100 home runs was Mel Ott, who got his 100th at 22 years, 132 days in 1931.

Harper's 100th career home run, also his first grand slam, was calculated at 429 feet.

Since his debut in 2012, he has 21 home runs calculated at 425 feet or longer, including his 429-foot shot Thursday. The major league leader in homers of such length since 2012 is Giancarlo Stanton, with 48.

Harper is the only major-leaguer whose first grand slam came on his 100th career home run, Elias research shows.

Other notable players whose 100th career home run was a grand slam include David Ortiz, Carlos Peña, Mo Vaughn, Dustin Pedroia and John Kruk.

Harper punishes Teheran

With the home run, Harper improved to 12-for-27 with five home runs in his career off Julio Teheran, the Atlanta Braves' starter on Thursdsay. Teheran is tied with Tom Koehler for most home runs allowed to Harper. Sean O'Sullivan is third with three.

Harper is the third player with at least 100 home runs for the Nationals, trailing Ryan Zimmerman (200) and Ian Desmond (110).

Fifty-three of Harper's home runs, including No. 100, have come on fastballs. The next most common pitch he has homered off is a slider (22).