"As we saw with Jacoby Ellsbury, speed is the first thing to go for baseball players."
Ellsbury seems to be the automatic comp for Duran. I get it - Ellsbury played for us not long ago, he was an outfielder, he was really fast.
But is it really true that speed goes early as a general scientific principle?
Rickey Henderson led the majors in stolen bases at age 39.
Lou Brock led the majors in stolen bases at age 35.
Both these two continued to be speed demons until way past the "wrong side of 30."
So I'm disputing the accuracy of that statement.