Corey Seager became the first Los Angeles Dodgers rookie and first rookie shortstop in MLB history to hit three home runs in a game on June 3, 2016, with all three being solo shots in a 4-2 victory over the Atlanta Braves at Dodger Stadium. At the time, Seager became the sixth-youngest player in Major League history to accomplish the feat.
From the collection: Corey Seager fan-cave plaque →
Source: Historical record