Cobb 4,000: known at the time?

Yankee announcers said that Ty Cobb got hit # 4,000 on this date in 1927.

Would that have been known at the time?

Cobb broke Cap Anson's career record for hits (3,435) on September 22, 1923 in the first game of a doubleheader in Boston.  Cobb needed two hits to tie; he went 4 for 5 including a home run and double.  In game 2 Cobb went 1 for 5.  Cobb was 37, same age as Jeter.

Cobb had 3,900 hits with Detroit but only 79 in 79 games in 1926.  Cobb turned 40 December 18, 1926.  Would Detroit have known that Cobb had a chance for the 4,000 hit milestone?  Would it have been a big deal?  Was it known that Cobb already had the career hit record?

Cobb played for the Philadelphia Athletics in 1927 and 1928, his final seasons.  Cobb got his final 289 hits with Philadelphia.

With all the fuss about Derek Jeter becoming the 28th player and first Yankee to get 3,000 hits, I wondered about Cobb's situation.

I wonder if it is analogous to Hank Aaron going to the Milwaukee Brewers in his final two seasons after setting the career home run record in his last season with the Braves.  Aaron hit 733 home runs with the Braves and 22 with the Brewers,