Alyssa Nakken simply said "this is my job" after becoming the first female to coach on the field in a regular season Major League Baseball game.

Nakken arrived to coach first base in the San Francisco Giants' clash against the San Diego Padres on Tuesday in the third inning following the ejection of Antoan Richardson.

The 31-year-old was warmly greeted by the fans at Oracle Park and was offered a handshake by Padres first baseman Eric Hosmer. She also received a hug from Giants catcher Curt Casali after returning to the dugout in the bottom of the third.

Speaking after the landmark moment, Nakken said: "I think we're all inspirations doing everything that we do on a day-to-day basis and I think, yes, this carries a little bit more weight because of the visibility, obviously there's a historical nature to it.

"But again, this is my job. We needed a coach to coach first base. Our first-base coach got thrown out.

"I’ve been in training as a first-base coach for the last few years. I work alongside Antoan, so I stepped into what I've been hired to do."

Giants manager Gabe Kapler added Nakken had "prepared for this moment" as part of her work since becoming the first woman to coach in MLB when she was hired in January 2020.

"It's not a foreign spot on the field for her," he said. "She does so many other things as well that aren't seen.

"So, it's nice to see her be right there in the spotlight and do it on the field."

The Giants beat the Padres 13-2 to move to 3-2 for the season.

The moment came just four days after Rachel Balkovec became the first woman to manage a minor league affiliate of an MLB team, guiding the New York Yankees' Class A Tampa club to victory.