His primary offensive skill was to get on base, and he recorded the second highest on-base percentage in modern baseball history among rookies with more than 100 plate appearances.

Henriksen was mainly a bench player for the Red Sox, but he delivered a decisive hit against the famous pitcher Christy Mathewson in Boston's World Series victory in 1912.

At the beginning of the 1912 season rumour had it that Olaf Henriksen and his teammate Hugh Bradley were to be traded to the New York Highlanders in exchange for star player Hal Chase.

[4] The public began to take notice of Henriksen, as evidenced by this preseason analysis of Boston's roster: The outfield will remain about the same for Speaker, Lewis and Hooper are a trio that is hard to beat.

[6] A year later the New York Times reported that the Brooklyn Robins was attempting to sign Henriksen with the intention of letting him reassume his familiar role as a pinch hitter, but the negotiations apparently stalled.

[8] He also managed the semipro team of the Grow Tire Company of Boston [9] Henriksen's family included his wife Mary and daughter Catherine.

He never became a regular in the lineup but instead he served as a backup for Red Sox' famous outfield trio consisting of Tris Speaker, Harry Hooper and Duffy Lewis.

On June 7, 1916, when Ruth had pitched 7 innings versus the Cleveland Indians, Henriksen was substituted into the game and got a base on balls, which ultimately tied the score at 1–1.

Among rookies with a minimum of 100 plate appearances in their first season in Major League Baseball, Olaf Henriksen registered the second highest on-base percentage since the year 1900 when he in 1911 posted a mark of .449.

However, strikeout data for hitters only dates back to 1913, so in the years with complete statistics his walk/strikeout ratio was 69/43 = 1.6, which is far above the Major League average of that period (approximately 0.8).

[15] He recorded 15 stolen bases versus 9 caught stealing over the course of his career, although the last figure is doubtful due to insufficient data from that age in that particular statistical category.