You'd never recognize Tiger Woods by his real name!
Does Eldrick ring a bell? What about Elisha? Okay, okay... how about Gerald?
It's no huge surprise for an athlete to use his or her middle name, but some of your favorite sports stars go by something completely different.
Here are 15 famous athletes you might not recognize by their real names:
1. Wardell Stephen Curry – Steph Curry
The NBA MVP's legal name is Wardell Stephen Curry II, after his father Dell, but as Curry told ESPN while he was at Davidson, people have always just called him "Steph."
2. Lew Alcindor – Kareem Abdul-Jabbar
"I used to be Lew Alcindor, the pale reflection of what white America expected of me. Now I'm Kareem Abdul-Jabbar, the manifestation of my African history, culture and beliefs."
3. Elisha Nelson Manning – Eli Manning
New York Giants quarterback Eli Manning's legal name is Elisha. Let that sink in.
He's always gone by Eli, but when the Giants selected Eli Apple in the 2016 draft, Manning was asked how he's going to manage sharing a name:
"Never really cared about other people's names, I don't know what we'll do. We'll figure it out. I have seniority, so we can call him E.A. or Apple, maybe. I don't know, call me Elisha, maybe switch to my official full name," said Manning.
4. John Matthew Stafford – Matt Stafford
The Detroit Lions quarterback goes by Matthew, or Matt, but his full name is actually John Matthew Stafford. Who knew?!
5. Vincent Edward Jackson – Bo Jackson
His brothers called him a "wild boar" growing up because of his trouble-making tendencies, but after a few years, they shortened the nickname to "Bo." The nickname has followed the two-sport athlete through his entire career.
6. Gerald Dempsey Posey III – Buster Posey
The Giants catcher was born Gerald Dempsey Posey III, but his grandmother called him "Buster" growing up to differentiate from his namesake father. The nickname stuck, and now we have what's unarguably one of the best names in baseball.
7. Lori Jones – Lolo Jones
Lolo Jones actually shares a name with her mother, Lori Jones. The Olympian has always gone by her nickname, Lolo.
8. Walter Ray Allen Jr. – Ray Allen
NBA player Ray Allen was born with the name Walter Ray Allen, but has gone by "Ray" his whole life.
9. George Herman Ruth – Babe Ruth
We all know the legendary baseball star as Babe Ruth, but he was actually born George Herman Ruth and didn't take on the name Babe until later in life when he signed with the Orioles.
10. Elrick Tont Woods – Tiger Woods
After years of being known on the golf course as Tiger, the man born Eldrick Woods decided to make the name official when he turned 21. Obviously, the name change didn't make many headlines since we all already knew him as Tiger.
11. Cassius Clay – Muhammad Ali
Born Cassius Clay, one of the most legendary athletes of all time became Muhammad Ali when he joined the Nation of Islam in 1964. Many refused to call him by his new name at first, so much that you might not have even realized they were the same person. Muhammad Ali, or Cassius Clay, is known as a sports icon.
12. Chad Johnson – Chad Ochocinco
The NFL receiver Chad Johnson ditched "Johnson" and became Chad Ochocinco, which was his Spanish translation of his number in football -- number 85. Four years later, Chad went back to his last name from birth, Johnson.
13. Earl Smith - J.R. Smith
J.R. Smith was born "Earl," went by J.R. for the majority of his life, and then decided to bring back "Earl" for less than 24 hours when he was making his return to basketball. It was a short-lived name change:
"I got a lot of calls and text messages and e-mails. It wasn't a good move," Smith said.
So, back to J.R. Smith he went.
14. George Ken Griffey Jr. - Ken Griffey Jr.
The namesake of his baseball icon father, Ken Griffey Jr. was also born with the first name George.
15. Earvin Johnson Jr. - Magic Johnson
Basketball legend Earvin "Magic" Johnson was first called "Magic" when he was a star at Everett High School. He was given the nickname by a sports writer who had just seen him put up 36 points, 16 rebounds and 16 assists at just 15 years old.