Devers: 19 HR Against Yankees (One Shy Of Boston Record Before Age 26: TSW, 20)

Rafael Devers has hit 19 home runs against the Yankees in his career (including six this season).

The only player in Red Sox history with more homers against the Yankees before turning 26 is Ted Williams, who hit 20. Devers has six more games this season in which to tie or pass TSW. Devers's 26th birthday is roughly three weeks after the end of the regular season, on October 24.

It should be noted that Williams hit his 20 dongs in only four seasons. He missed his age 24, 25, and 26 seasons because of military service. However, the games played and plate appearances for Williams and Devers are very similar at the moment.

Williams:  80 games  349 PA  20 HR
Devers:    82 games  339 PA  18 HR

Williams

     AGE    G   PA   HR    AVG   OBP   SLG    OPS
1939  20   18   77    6   .350  .494  .783  1.277
1940  21   19   84    6   .353  .476  .677  1.153
1941* 22   21   92    2   .471  .609  .632  1.241
1942  23   22   96    6   .299  .438  .584  1.022
1943  24  Did not play, military service
1944  25  Did not play, military service
           80  349   20

Devers

      AGE   G   PA   HR    AVG   OBP   SLG    OPS
2017   20  10   39    3   .306  .359  .583   .942
2018   21  13   52    1   .204  .231  .286   .517
2019   22  19   82    3   .276  .329  .513   .843
2020   23  10   46    1   .209  .261  .326   .587
2021   24  19   76    5   .250  .316  .500   .816
2022   25  11   44    6   .250  .318  .750  1.068
           82  339   18 

Jimmie Foxx, who made his major league debut at age 17, hit 32 homers against the Yankees in the nine seasons before his 26th birthday. (He clubbed 10 each at ages 24 and 25.)

*: In 1941, Williams batted .444/.588/.905 against the lowly Philadelphia Athletics in 85 PA (for a n OPS of 1.493). He walked 21 times and struck out once, that lone strikeout coming on September 27, in his final plate appearance in the next-to-last game of the season, one of only 27 times (in 606 PA) he struck out that year. The following day, the Red Sox ended its season with a doubleheader against the Athletics, Williams went 6-for-9, finishing with a .406 average.