Move over Jason Kelce, Jordan Mailata, and Lane Johnson, there’s a new sports band in town.

It formed organically, almost in an instant this past Sunday night, and it’s about to take the city by storm.

Its not-so-humble beginnings were born inside the imagination of Phillies left fielder Brandon Marsh.

Mic’d up for a segment on ESPN’s Sunday Night Baseball, Marsh was expecting a lot of baseball questions. But one, from a fan, came out of the blue.

Marsh wasn’t expecting the question and had to think quickly on his feet. He had just made the third out of the inning and only had the time it would take to jog off the field and into the dugout to come up with an answer:

Who on the Phillies would be in his rock band and what would it be called?

Marsh identified Garrett Stubbs, Kyle Schwarber and Cristian Pache as his bandmates and the name. Well…

Stay loose and sexy. Put it on a T-shirt.

“Oh, we got one,” Marsh said after batting practice Tuesday. “I’ll bring it out tonight.”

Stay tuned postgame, Phillies fans.

Marsh admitted that he was put on the spot with the question, and while it wasn’t difficult to come up with his fellow bandmates, the name was blurted spontaneously – and it’s been an absolute hit.

“I was a bit nervous,” he said. “I was a little panicked. A little bit. That was the first thing that came to my mind, and I’m glad I said it.”

How could he not be? It perfectly describes how the Phillies are playing right now – loose and sexy. They are having fun putting together a season that is their third-best start in franchise history. It’s every bit as loose and sexy as it can be.

As for the band, Marsh doubled down on the guys and gave further descriptions as to what their roles would be. He started by talking about Pache, who may have been a surprise to most fans to be included, but in reality, the locker room is pretty split on who the most entertaining guy is in the clubhouse between Stubbs and Pache.

Pache is a sneaky “vibes” guy.

And apparently he’s a hell of a dancer.

“He’s the best dancer on the team,” Marsh said. “You put on any song – country, jazz, hip hop, rock – that dude’s getting down to it. And it’s on beat, on cue and it looks nice. Pache has got to be in the band.”

Can’t wait for the dancing Pache memes.

But every great rock band needs a powerful lead vocalist.

“That’s Schwarber,” Marsh said. “He can control the room. He can read the room well and amplify when he needs to.”

He also has some experience as a frontman, sorta:

Schwarber and his teammates recreated this high school moment when he was on the Cubs. Marsh didn’t know anything about this video when I told him about it.

“I’m looking it up as soon as I get inside,” he said.

As for Marsh’s role in the band?

“If you give me some time, not saying I can do it, but probably the drums,” Marsh said. “Guitar seems way too difficult, but I feel like I can bang some stuff around.”

Does that mean Stubbs is lead guitar? Bass?

“He could do guitar, but there needs to be a backup singer with the ad libs and stuff like that, right? Stubby can do that,” Marsh said.

So, maybe the band needs to be more than just the four of them.

Either way, with how fans latch on to fun things with this team – homer hats, playlists, sing-alongs, overalls, you name it – Stay Loose and Sexy has a chance to be bigger than Beatlemania in Philadelphia this summer.