“Kerber Baby” is at the U.S. Open. She may sound like baby food, but her game is far from infantile.

ESPN tennis analyst Brad Gilbert makes a career of creating goofy nicknames. German Angelique Kerber’s nickname, a take on the Gerber Baby, is just one of many.

“It goes over some people’s heads,” Gilbert said. “People will say, ‘She’s not a baby,’ but it has nothing to do with that.”

When Gilbert creates a new nickname, there is no systematic process. He looks at the player’s name and formulates a word association he finds funny and hopes his audience thinks the same. Sloane Stephens becomes “Sloane Ranger;” Jared Donaldson becomes “He Went to Jared.”

Gilbert’s nicknames, many of which are created spontaneously, originate from references to pop culture, food and brands, among many other sources.

Gilbert is part of the ESPN team that will be covering the U.S. Open for the next two weeks. He’s a retired tennis pro with 20 titles to his name and former coach of world Nos. 1 Andre Agassi, Andy Murray and Andy Roddick. He may not have an extensive media background, but he more than makes up for it with his unique approach to commentating.

Gilbert has been creating nicknames since starting at ESPN in 2003. Growing up, he was inspired by ESPN personality Chris Berman, famous for his quirky and playful nicknames.

In 2009, Gilbert joined Twitter, and the nickname biz took off. He often gets requests from both fans and players’ agents to think up new names. One of his most recent creations is “Shap Stick,” for Canadian sensation Denis Shapovalov. Gilbert explained the origin, saying he looks like a hockey player and his powerful groundstrokes resemble that of an NHL star. Before a name debuts on air, ESPN tennis analyst Chris Fowler said they discuss the names with an unofficial committee before approval.

Fowler said Gilbert’s nicknames help to humanize the sport in a world of data and statistics.

“His quirky style is not going to be perfect English, but it’s usually entertaining,” Fowler said.

“Putting some kind of panache and vernacular into it makes it a lot more fun,” added Gilbert.

Sometimes names don’t connect. One of Gilbert’s biggest reaches is current world No. 1 Karolina Pliskova’s “Snake Pliskova,” a riff on Snake Plissken, the hero of the 1981 cult classic, “Escape from New York.

“It’s a really clever one, but some people think it’s demeaning to call somebody ‘snake,’” he said.

American pro Christina McHale — “McHale’s Navy” — said Gilbert’s nicknames are funny and great for the sport.

“I think it’s awesome,” she told The Post. “There’s McHale’s Navy, you have the Genie Army [the name of Eugenie Bouchard’s fan base] … It gives the fans more of a chance to get involved.”

Gilbert told The Post that Romanian Simona “Halepeño” Halep embraces her moniker. Though not a fan of spicy foods, she loves her name so much that Adidas developed a line of “Halepeño” T-shirts.

Fowler admitted Gilbert’s nicknames can be too much, particularly when he intentionally mispronounces foreign names. He cites French player Gilles Simon’s nickname, “Simon Sez,” whose last name is actually pronounced SEE-mon, not SI-min, as an example. But Fowler commends some, namely Spain’s David “The Little Beast” Ferrer and Britain’s Johanna “Kontador” Konta. He speculates the latter is a reference to either Spanish cyclist Alberto Contador or simply to a condor.

“A lot of these nicknames just sort of work their way into tennis lexicon,” Fowler said.

Tennis audiences enjoy Gilbert’s nicknames, but Fowler said it’s his tennis knowledge and genuine passion that keep fans hooked.

“The dude eats, sleeps, breathes tennis,” Fowler said, “and it comes across.”