Looks can be deceiving.
On his 19th birthday, future No. 1 overall pick Greg Oden already looked far older than many men will ever look in their lifetime.
When Derek Jeter tipped his cap and walked off the field at the All-Star Game for the final time earlier this week, he hardly looked a day older than the kid that burst onto the scene 20 years ago.
It's a funny thing, age—and it's a funny thing that sports fans, for whatever reason, seem to obsess about. But it's not jut about how players look at a certain age. It's also about what they've done.
Look how much Mike Trout has accomplished before age 23! Look how old R.A. Dickey was when he won the Cy Young! Somebody, quick, find a birth certificate and see if Sonny Gray is actually legally allowed to drive a car yet!
The 10 pairs of current and former athletes on this list might surprise you. You'll see players of the same age who look like they could be father and son. You'll see washed-up busts of a forgotten generation who are the same age as superstars and champions.
So, arm yourself in every preconceived notion that you have of how a player should look or perform at a certain age, and allow your mind to be blown.