UC Berkeley Mascot: History + Fun Facts

The University of California, Berkeley (UC Berkeley) is known for academic excellence, political activism, and a fierce rivalry with Stanford. But at the heart of its school spirit is the UC Berkeley mascot, someone a little unexpected: an old-school, potbellied bear with a frozen grin and a mysterious past. 

Meet Oski the Bear, the official UC Berkeley mascot since the 1940s. He’s funny, secretive, and occasionally controversial. In this blog, you’ll get to know the history behind the UC Berkeley mascot and learn what it takes to step into the bear suit yourself.

• Who Is the UC Berkeley Mascot?
• Fun Facts about the UC Berkeley Mascot
• How to Become Oski the Bear
• Frequently Asked Questions
• Takeaways

Who Is the UC Berkeley Mascot?

The UC Berkeley mascot is Oski the Bear, a costumed character who has brought pride and personality to the university since 1941. He represents the Golden Bears, which is the name of UC Berkeley’s athletic teams, and appears at rallies, football games, and other campus events.

Before Oski came along, Cal tried using real bear cubs at football games in Memorial Stadium. That worked for a few years, but as the cubs grew bigger (and harder to handle), the school decided to retire the live mascots and look for a safer and more spirited replacement.

History of Oski the Bear

Oski made his big debut at a freshman rally in the Greek Theatre on September 25, 1941. His name came from the “Oski Wow-Wow” cheer, a chant that had been part of Cal tradition for generations. The cheer was actually inspired by Ivy League yells from the 1800s, like Georgetown’s “Hoya yell.”

Oski was created by William “Rocky” Rockwell, a new transfer student from Long Beach Junior College. He had worn a Viking mascot costume at his old school and thought Cal needed something similar, something fun, memorable, and a lot easier to manage than a live bear.

Working with campus art editor Warrington Colescott, Rockwell pieced together the first Oski costume using old clothes, gold-painted shoes, and a bear head he sculpted himself over a football helmet.

Rockwell wanted to name the bear “Algy,” but Colescott convinced him to go with “Oski” instead. The name came from the famous Cal cheer and even echoed a football term, OSCI, which is short for “other side caught it.” Oski was a hit right away! He led cheers, waved to kids, and entertained the crowd with playful stunts, quickly making him a campus favorite.

Though he became a public figure on the field, Rockwell kept his identity a secret. He stashed the costume under the bleachers and never revealed he was the one behind the mask.

Aura of secrecy

Oski’s hidden identity didn’t stop with Rocky Rockwell but became part of the mascot’s legend. As Oski became more popular, some students worried rival schools could target him. What if someone tried to kidnap the mascot? That’s when the Oski Committee was born.

Formed in the early 1940s, the Oski Committee became the official group in charge of all things Oski. They’re like his personal secret service. Members use code words like “our friend” when talking about Oski in public, and no one outside the group knows who’s wearing the suit, not even other spirit leaders.

The committee chooses who gets to play Oski and makes sure his identity stays a mystery until graduation. They even had Oski travel separately to events for years, so no one could spot him before he suited up. Even when budgets got tighter, the secrecy stayed, well, top secret.

That tradition continues today. If you asked someone in the marching band or on the Rally Committee who Oski is, they wouldn’t tell you even if they knew. Some alumni have even spent decades suspecting their roommate was Oski and still don’t know for sure.

Now, all that secrecy isn’t just for fun. It keeps the character alive and lets each new Oski step into the role without personal attention. He’s not just a student in a costume but a timeless part of UC Berkeley. And honestly? That mystery is a big reason why Oski is still going strong after more than 80 years.

Fun Facts about the UC Berkeley Mascot

Oski’s history is already full of surprises, but the behind-the-scenes stories are even better. From his old-school outfit to his offbeat personality, here are some fun facts that make Oski one of the quirkiest mascots in college sports.

1. Oski’s roots go back to Illinois.

While Oski’s look and personality were born at Berkeley, the name itself has earlier ties. A version of the “Oski Wow-Wow” cheer was used at the University of Illinois (UIUC) as far back as 1899. Their version had a slightly different ending but served the same purpose: firing up the crowd at sporting events.

Here’s how the full chant goes:

Oski Wow-Wow!

Whiskey Wee-Wee!

Olee! Muckie-eye!

Olee! Berkeley-eye!

California! Wow!

Illinois claims to have invented the cheer, but UC Berkeley yearbooks show that the yell was used even earlier. At Cal, it had a special meaning, as it was often shouted as an anti-temperance or anti-Prohibition protest cheer, which explains the surprising reference to “whiskey.”

In Illinois, the chant was called “Oskee.” Fans used it so often that some Cal students jokingly referred to them as Oski’s “original disciples.” Although Berkeley gave Oski his iconic bear form, the cheer that inspired his name may have come from much older traditions shared across campuses.

2. He’s a Libra.

Yes, even mascots have birthdays. Oski was “born” on September 27, 1941, making him a classic Libra. That means he officially shares a zodiac sign with people known for charm, humor, and a strong sense of balance. Not bad for a slightly off-balance bear!

In 2016, Oski hit a major milestone: he turned 75 years old. Cal went all out to celebrate. The Homecoming pep rally that year doubled as a birthday party, held right in the middle of Sproul Plaza on September 30.

The celebration continued with a tongue-in-cheek lecture titled “Oski Bear and the Struggles of Being a 75th-Year Sophomore.” Students and alumni could also grab free Oski hats, enjoy a Bear Affair Tailgate BBQ, and watch a special on-field tribute during the Cal vs. Utah football game.

It was a packed birthday weekend, just the kind of celebration you’d expect for a mascot who’s been part of campus life for generations.

3. His style hasn’t changed in over 80 years.

Oski has looked the same for decades. With his potbelly, slouched posture, big grin, and blue cardigan, he’s more cuddly than intimidating. Some students even said he looked like a teddy bear or, to younger fans, a dog.

That grin is one of his most recognizable features. It was molded into the original costume’s head in 1941, and every version since has kept it exactly the same. No matter what Cal event you’re at, you can always spot Oski by that fixed smile.

In 1999, some student leaders tried to give him a makeover. They passed a bill calling for him to stand straighter, lose the potbelly, dress more stylishly, and act tougher, something they thought would better represent a top football school.

However, not everyone agreed. The student body president at the time vetoed the proposal, arguing that Oski’s look was iconic and didn’t need fixing. Even when Cal Athletics adopted a newer, more aggressive bear logo in the 2000s, Oski stayed the same.

Today, he still wears his classic cardigan, unchanged and unmistakable. His old-school appearance may not scream modern mascot, but that’s what makes him stand out.

4. He was once named one of the worst-behaved mascots.

Oski might look like a walking teddy bear, but don’t let that grin fool you. For years, he was known as one of the most misbehaved mascots in college athletics. Whether he was pulling stunts, stirring up drama, or just causing chaos for the fun of it, Oski knew how to keep things interesting.

One of his most infamous moments came in 1990, when Oski threw a cake at Oregon State fans during a basketball game. Some of it landed on the father of Oregon State point guard Gary Payton. The incident earned Oski a two-week suspension and cemented his place in Cal history as one of the rowdiest mascots around.

Even though he’s calmed down a bit in recent years, Oski’s legacy of mischief still lives on. He may not be riding motorcycles anymore, but the stories from his wilder days make him such an unforgettable part of Cal history.

5. He once walked across a goalpost.

Speaking of his antics, Oski used to get away with all kinds of wild behavior during games. One of his most legendary stunts was balancing on the narrow crossbar of a football goalpost like it was no big deal. 

That wasn’t the only time he caused a scene. Oski sometimes pretended to grab the football when the referee wasn’t looking or sneak up behind players just for laughs. Fans never knew what he’d do next, which made watching him almost as fun as watching the game itself. Oski definitely made sure fans got a show, whether the team was winning or not.

6. He’s in numerous Cal fight songs.

Even though the original Oski Yell isn’t heard much anymore, Oski’s name lives on in some of Cal’s oldest and boldest fight songs.

In “Stanford Jonah,” Oski makes an entrance right before the Golden Bear devours the competition:

When we meet her, our team will surely beat her.
Down on the Stanford Farm there’ll be no sound,
When our Oski rips through the air.
Like our friend Mister Jonah,
Stanford’s team will be found
In the tummy of the Golden Bear!

In “California, We’re For You”, Oski’s “mighty thunder” helps drive home the victory:

All our rival’s hopes are doomed to die,
When our Golden Bear looks down on high;
Hear our Oski’s mighty thunder,
California, we’re for you.

And in the “California Marching Song”, his growl practically shakes the ground:

Californians fight with the sturdy might
Of the growling Golden Bear.
Our Oski sounds and shakes the ground
As vict’ry fills the air.

These songs may be old-school, but they show just how deeply Oski is woven into the spirit and sound of Cal tradition.

7. He’s (maybe) dating the Stanford Tree.

The Cal–Stanford rivalry isn’t just about football but extends to the mascots, too. During the 1988 Big Game, their sideline rivalry got so intense that security had to break them apart. Fights between mascots aren’t exactly common, but these two have never played by the rules.

Lately, though, things have taken a weird turn. In 2024, The Stanford Daily published a satirical article claiming that Oski and the Tree were secretly dating. It joked that their “arm-in-arm” exit from a fundraising dinner sent fan-fiction sites into meltdown. The internet ran with it, and stories popped up everywhere, giving their fake relationship a life of its own.

Is it real? Of course not. But in a rivalry this over-the-top, even the mascots come with fan theories.

8. He’s on social media.

For a mascot who keeps his identity a secret, Oski has a surprisingly public presence online. You can find him on Instagram, X (formerly Twitter), and Facebook, where he posts photos from campus events, reacts to Cal wins, and occasionally trolls rival mascots.

His posts are full of personality, just like the real Oski! Expect goofy selfies, throwback photos, and the occasional meme or dig. Even without saying a word, he still manages to keep students and alumni laughing. Oski may have been born in 1941, but he’s clearly kept up with the times.

How to Become Oski the Bear

Now that you know some fun facts about Cal’s beloved bear, have you ever wondered what it takes to actually be him?

Now, becoming Oski isn’t as simple as putting on a bear suit. It takes energy, spirit, secrecy, and a whole lot of sweat—literally. For students who dream of stepping into Oski’s big, baggy shoes, there’s an unspoken checklist you’ll need to hit.

First, you have to love UC Berkeley. And not just the picture-perfect version! You need to embrace every flyer-filled walk through Sproul Plaza, every uphill trek to class, and every 8 a.m. lecture. Oski never frowns, no matter what. That smile is constant because the student inside truly bleeds Blue and Gold.

You’ll also need charisma. Oski doesn’t talk, but that doesn’t stop him from being the center of attention. Whether it’s dancing at rallies, skipping through a tailgate, or sneaking up on unsuspecting students, Oski knows how to own a room. Bonus points if you’re great with kids! Oski needs to be as huggable as he is hilarious.

Then there’s the physical part. Oski moves in a weird half-skip, half-strut you’ll need to master. Some students practice on treadmills to get it right. You’ll also need to be sneaky, as Oski appears out of nowhere, works a crowd, and disappears before anyone knows who was inside the costume.

Oh, and prepare to sweat. The suit is hot, heavy, and not designed for comfort. But no matter how stuffy it gets, Oski never breaks character. If you can skip across campus in a full-body costume without melting, then you just might have what it takes to be UC Berkeley’s most iconic bear!

Frequently Asked Questions

1. What is UC Berkeley’s mascot?

UC Berkeley’s mascot is a bear named Oski. Before he debuted in 1941, the school used live bear cubs at games, but they eventually switched to a costumed mascot that was easier (and safer) to manage.

2. What is the UC Berkeley mascot’s name?

His name is Oski, and he was inspired by the “Oski Wow-Wow” cheer used at Cal sporting events. The name has been part of Berkeley tradition for generations. He’s known for his mischievous personality, old-school style, and long-standing campus traditions.

3. Is UC Berkeley an Ivy?

No, UC Berkeley isn’t part of the Ivy League, but it’s one of the hardest colleges to get into in California. With an acceptance rate of around 11%, it’s the second most selective UC campus after UCLA and is consistently ranked among the top public universities in the world.

Takeaways

• Oski the Bear has been UC Berkeley’s official mascot since 1941, replacing the live bear cubs once used at games.
• His name comes from the “Oski Wow-Wow” cheer, which dates back over a century and still appears in Cal fight songs.
• The UC Berkeley mascot is full of fun facts, like walking across goalposts, starring in fight songs, and maybe dating the Stanford Tree.
• Becoming Oski requires school spirit, physical stamina, and total secrecy. Only a select few students are chosen.
• Applying to UC Berkeley soon? Work with a college admissions consultant to craft a standout application and improve your chances of getting in.