Shohei Ohtani has been on the Angels' major league roster for 11 days. He has played six games.
What/How has he done?
He is the first player to start as a pitcher and a non-pitcher in his team's first 10 games since 1920 (Joe Bush (Red Sox) and Clarence Mitchell (Dodgers))
He is the first player to start as a non-pitcher on Opening Day followed by a pitching start in his team's first 10 games since 1919 (Babe Ruth, Red Sox)
He is the first player to start as a pitcher and a non-pitcher in the same season since 1988 (Rick Rhoden, Yankees, 30 starts as pitcher, one as DH)
He is the first player to earn a win and then hit a home run in a start as a non-pitcher in his next game since Babe Ruth did it on June 13-14, 1921
He is the first player to have at least four hits, a home run, and a win in his team's first six games since 1937 (Wes Ferrell, Red Sox)
He is the second player to homer in three consecutive games and record a double-digit strikeout game in the same season since 1916 (Babe Ruth (1916 Red Sox) and Ken Brett (1973 Phillies))
He is the first player to have two pitching wins and three home runs in his team's first 10 games since 1919 (Jim Shaw, Washington Senators)
He is the first rookie with at least three hits and at least one pitching win in his team's first 6 games since 1924 (Dutch Stryker, Boston (NL))
He is the first Angels rookie to homer in his first two games at Angel Stadium
He is the first Angels pitcher with at least six strikeouts in his pitching debut since 2003 (Kevin Gregg)
He is the second Japanese-born pitcher with 6+ innings, 6+ strikeouts, and four-or-fewer baserunners allowed in his pitching debut.