If you’ve been to a Toronto Blue Jays game and sat in section 521 of the Rogers Centre, chances are you know Maureen Konnyu.

The sprightly 66-year-old, an usher for the team since 2002, is hard to miss, with her booming voice, leading a chant every time a player comes up to bat. Her unparalleled enthusiasm has her greeting every fan in her section, often trying to learn their names or when they’re young, teach them cheers.

On Saturday, a day after the Jays clinched their first playoff spot in 22 years, the mother of two was giddy with excitement, squealing with every home run and kneeling down to chat with young ones about their homemade signs.

It’s the kind of hospitality, the fans have come to adore, even in past years when the team was far from the powerhouse they have shaped up to become this season.

They celebrate birthdays and milestones with Konnyu and clamour for photos with her, posting them on her Facebook fan page, Maureen’s Fans.

Years ago, Konnyu was far from the exuberant firecracker that people at the ballpark know by name.

She had quit her bank teller and property management jobs to be a stay-at-mom. A difficult divorce left her “with little confidence or self-esteem.”

But she loved the Jays, so her son convinced her to apply for a job at the Rogers Centre.

When she showed up in a Carlos Delgado jersey, a Jays hat and team sunglasses, doing one of her now-signature chants, she recalls the hiring woman “cracked up laughing.”

She was hired soon after to work in the 500 level at her request — it’s where the diehard fans sit.

It’s where you’ll often find Michael Callahan, a 62-year-old developmentally disabled man she takes care of.

He lived in the same building as Konnyu.

“I just took him under my wing, but I was used to doing that,” she said, noting she raised foster kids, one who also works at the stadium.

“She took me into her house and gave me a clean shave,” said Callahan. “She always treats me so nice.”

Since he met Konnyu, he’s rarely missed a game.

On Saturday, he was tucked into a seat beside Tony Lant, a longtime season ticket holder, who reckons he has known Konnyu for 15 years.

“She’s a pleasant lady,” Lant said. “She welcomes everybody. The people feel they’re home and wanted and that the Jays really care.”

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Konnyu, he said, goes the extra mile to ensure everyone has a good time.

She keeps cloths on hand to wipe seats, and for sunny days, she always has sunscreen on hand for the kids.

She keeps a stash of programs purchased with her own money to hand out to fans, from as far away as Japan and Australia.

She remembers birthdays of veteran fans and marks the occasion with personalized cards.

And she ends every game with a procession of high fives.

As fans trickled out on Saturday, they gave her hugs and promised to be back soon. When they doled out compliments, she was humble.

“I don’t know what the fuss is,” she told the Star. “This is who I am.”

It’s a feeling that has stuck with her for every game, including her first working section 510.

“A little girl ran down with a broken arm. She asked me if she could have my autograph,” recalled Konnyu. “I said, ‘I’m just the usher,’ but it just kept happening. I was amazed.”

To date, she’s received dozens of letters praising her attention to detail and treatment of guests, but for Konnyu, it’s not something she brags about.

“Every day coming to work is a joy. Just being here, I can’t even explain it,” she said. “The back aches, the cramping is all worth it. I love my job and I love the fans.”