That's not amazing.
That's a bullcrap stat ESPN dredged up to stroke Jeter's cock. Nevermind that the 1913 Pittsburgh Pirates were 78-71 with 39 year old Honus Wagner as their shortstop.
How many teams have had a 39 year old short stop (is it 1 out of 5 or 1 out of 500)
Also, on the rare occasions when a team did field a 39 year old SS, what did the rest of the team look like? There's nothing amazing about that stat.