X different Opening Day Starting Second Basemen in X Seasons (since 1914)
Baseball-Reference takes us back until 1914 and while Retrosheet provides starting pitchers in their game logs, it doesn't have that for other positions.
The 10-year streak for the 1914-23 Cubs actually extends one year further. Johnny Evers was Chicago's mainstay at the keystone corner until he was dealt to the Braves (and won the 1914 World Series in his first season with his new club), He started the 1912 and 1913 openers before ten others followed over the next decade.
Colorado's revolving door will likely end this year with a repeat start by LeMahieu. During their decade-long streak, Rockies second basemen have posted a .264/.316/.377 slash line. Their MLB rank in BA, OBP and SLG over that span: 18th, 26th, 21st. That's with playing half their games at Coors Field.
With Joe Panik lined up at second this year for the Giants, they'll probably become the eighth team in the last century to reach eight in a row.
Here's the full list of second basemen from the teams shown above. Some interesting names here include Bill Wambsganss (turned an unassisted triple play in the 1920 World Series), Crash Davis (played three uneventful seasons with the A's before having the main character in one of the most famous baseball movies ever named after him), Jocko Conlon (not to be confused with Hall of Fame umpire Jocko Conlan) and Danny Murtaugh (bounced around as an infielder in the 1940s before he managed his Pirates to titles in 1960 and 1971):