Test Your Knowledge of MLB Jersey Numbers!

Did you know that for the first 60 years of Major League Baseball, uniforms didn’t have numbers? It seems crazy to think, considering how numbers like 2, 8, 24, and 42 have become iconic in the world of baseball. Think you know the jerseys numbers of star players past and present? Or what jersey numbers have been retired by teams? Test your knowledge of MLB jersey numbers in this fun and insightful quiz!

By Matt Johnson Issue with this quiz?

Qusetion: 1 of 25

Who was the last MLB player to wear number 42?

Mo Vaughn

Pedro Martinez

Kirk Rueter

Mariano Rivera

Qusetion: 2 of 25

After wearing 28 for his entire career, what number did Prince Fielder switch to when he played for the Texas Rangers?

Qusetion: 3 of 25

What is the only number retired league-wide?

Qusetion: 4 of 25

What number did all-time MLB consecutive games played leader Cal Ripken Jr. wear?

Qusetion: 5 of 25

What number did all-time MLB hits leader Pete Rose wear?

Qusetion: 6 of 25

Which of these modern stars wears the same number as the legendary Babe Ruth?

Bryce Harper

Mike Trout

Fernando Tatis Jr.

Wander Franco

Qusetion: 7 of 25

Which St. Louis Cardinals star wore number 1?

Stan Musial

Ted Simmons

Bob Gibson

Ozzie Smith

Qusetion: 8 of 25

Which is the only team in the MLB to retire all single-digit numbers?

Los Angeles Dodgers

New York Yankees

Boston Red Sox

Chicago Cubs

Qusetion: 9 of 25

Which of these numbers has NOT been retired by the Kansas City Royals?

Qusetion: 10 of 25

What number does pitcher Madison Bumgarner wear?

Qusetion: 11 of 25

Which two numbers have been retired by the Toronto Blue Jays?

37 and 23

12 and 34

25 and 24

11 and 21

Qusetion: 12 of 25

Which of these current star players does NOT wear number 27?

José Altuve

Giancarlo Stanton

Mike Trout

Juan Soto

Qusetion: 13 of 25

What number did star pitcher Greg Maddux wear?

Qusetion: 14 of 25

Which of these two teams wear home jerseys with only numbers and no names?

Dodgers and Cardinals

Cubs and Braves

Giants and Red Sox

Mets and White Sox

Qusetion: 15 of 25

Before wearing 25 for the majority of his career with the San Francisco Giants, what number did Barry Bonds begin his career wearing?

Qusetion: 16 of 25

Why does Toronto Blue Jays star Vladimir Guerrero Jr. wear number 27?

It was his father's number

He was born on March 27

It was his favourite number growing up

He has 27 cousins

Qusetion: 17 of 25

Which current MLB star wears 99?

Austin Riley

Yordan Alvarez

Fernando Tatis Jr.

Aaron Judge

Qusetion: 18 of 25

Which of these talented but temperamental players wore number 66?

Dellin Betances

Yasiel Puig

Bronson Arroyo

Ronald Acuna Jr.

Qusetion: 19 of 25

Aside from Ichiro Suzuki, which of these other star players famously wore number 51?

Randy Johnson

Tom Glavine

Andy Petite

Carlos Beltran

Qusetion: 20 of 25

What is the last jersey number from 0-99 to finally be worn in the MLB?

Qusetion: 21 of 25

What number did the legendary Joe DiMaggio wear?

Qusetion: 22 of 25

What number does two-way star Shohei Ohtani wear?

Qusetion: 23 of 25

Which of these star players did NOT wear number 24?

Miguel Cabrera

Rickey Henderson

Ken Griffey Sr.

Willie Mays

Qusetion: 24 of 25

What number did Hall of Famer and former home run king Hank Aaron wear?

Qusetion: 25 of 25

Which of these numbers has NOT been retired by the Boston Red Sox?

End Quiz & See Results

Matt Johnson

Matt is a part-time freelance writer and lifelong sports fan with a BA in clinical psychology. He has written copy in a variety of styles and forms, ranging from short-form captioning to medium-length listicles to long-form album reviews. As a passionate (and long-suffering) fan of the Leafs and Blue Jays, Matt’s love of sports has taken him from a post-graduate sport and event marketing program to the professional world as he is currently working for his local pro basketball team. You can find some of his writing in his portfolio writers.work/mattjohnson and follow his jersey concept page @mj94designs on Instagram.