SOUTH DENNIS — Kendra Maler will be on the big stage Monday morning, but she says she's not nervous.

Maler, 24, a Dennis-Yarmouth Regional High School graduate, will need some of that confidence as she will throw out the first pitch before the Red Sox vs. Orioles game at 11 a.m. Monday at Fenway Park.

"It's good. I'm super pumped," said Maler, who's hoping to meet Mookie Betts, her favorite player.

"I think I'm more nervous," Maler's mother Dawn added. "To be on the field to throw the first pitch in front of 30,000 people is pretty impressive."

Maler, who has an intellectual disability, got the opportunity through her best friend Maggie Reamer, who's from Brookline.

At age 15, Reamer started as a camp counselor at Camp Jabberwocky, an overnight summer camp for people with disabilities in Vineyard Haven, and that's when she met Maler.

The two have been friends ever since.

"She won me over quickly," Reamer said. "She is somebody who makes everybody around her feel very comfortable. She's a fast friend for sure."

This summer will be the 12th year both are attending the camp. Reamer used that experience to enter a contest showing community support, where the winner would get to throw out the first pitch for the Patriots Day game.

Reamer then posted a photo on Instagram of herself and Maler at Fenway Park explaining their 12-year friendship to each other. Sure enough, Reamer's post was selected, and she'll get to walk out to the mound with Maler to throw the first pitch.

"I've definitely dreamt about it," Reamer said, "and it'll be really fun to do it with one of my best friends."

Maler's reaction when Reamer called with the news: "O-M-G."

Maler is currently enrolled at Community Connections, a program that provides opportunities for adults with disabilities, and volunteers with organizations such as Meals on Wheels, the MSPCA and Cape Cod Cares for Troops.

She has also met New England Patriots stars Tom Brady and Julian Edelman at the Best Buddies Challenge, which ends on the Cape.

When Maler and Reamer go to Fenway on Monday, they both plan to get matching Red Sox jerseys, hoping to get autographs from players.

And when she walks onto the field Monday she already knows what pitch she's going to throw: A fastball.