Where Is Grant Gelt Now? The Bertram Who Conquered Music Business

By CelebPaid Research · Updated October 7, 2026 · 8 min read

Thematic illustration: a concert stage, evoking Gelt's music-industry career. This is a generic image, not a photo of the subject.Image via Wikimedia Commons

He was the tobacco-chewing geek of the Sandlot — Bertram Grover Weeks, the kid with the dip and the deadpan. Grant Gelt played him in The Sandlot (1993), in a role he almost didn't get: he and Marty York switched parts (Bertram and Yeah-Yeah) right before filming, when director David Mickey Evans realized each belonged in the other's character. It was the right call. And then Gelt did what few child actors manage: he left, and built something bigger.

Today he is a 20+ year music-and-entertainment industry veteran — artist management, creative services, brand, technology — and the Co-Founder and Chief Strategy Officer of Masscult, a Nashville creative agency. This is the verified story of where Grant Gelt is now.

The Peak: Bertram and the Role Swap (1993–1999)

The pre-production story is one of the film's great footnotes. As director David Mickey Evans later told Entertainment Weekly: "Once we got everyone together, it became pretty obvious which of them belonged in which character." Gelt, originally cast as Yeah-Yeah, became Bertram; York became Yeah-Yeah. The swap worked — Bertram's dry, slightly feral energy became one of the film's quiet delights.

Gelt's post-Sandlot acting was brief but busy: Mutant Species (1994), guest spots on Saved by the Bell: The New Class (1993), Empty Nest (1994), Boy Meets World (1995), a voice on Hey Arnold!, and The '60s (1999) — after which he retired from acting. He was still a teenager, and he had already decided the business he wanted was behind the scenes.

The Pivot: Twenty Years in Music and Entertainment

Gelt's second career is the most substantial in this group: a 20+ year career spanning artist management, creative services, brand work, and technology. While his former castmates were navigating auditions, Gelt was learning the machinery of the entertainment industry from the inside — the deals, the strategies, the infrastructure that makes careers happen.

He is now Co-Founder and Chief Strategy Officer of Masscult, a creative agency based in Nashville, Tennessee — Music City, the fitting headquarters for a former child actor turned music-business strategist. The agency works across consumer products, technology, and hospitality ventures. His fellow Sandlot alum Victor DiMattia works there too, as Director of Web3 Initiatives — the Timmons brothers' co-star turned colleague, thirty years later.

Patrick Renna (Ham) calls Gelt the "smartest" member of the Sandlot group — "even though he admittedly has absolutely no idea where his keys are." The joke lands because the record supports it: of all the kids on that field, Gelt built the most conventionally successful adult career, measured in companies founded and industries navigated.

Play Forever: The Nonprofit

The most meaningful chapter is Play Forever, the nonprofit Gelt co-founded with DiMattia (plus nonprofit veterans Jacque Williamson and Ivan Carter as COO). The mission: get more kids involved in all aspects of sports, regardless of socioeconomic background — channeling the generational impact of The Sandlot into real-world access.

"30 years ago, circumstance brought a bunch of kids together to create a baseball film, never imagining the impact the movie would have on generations of fans," Gelt said. "Now, we want to channel our years-long friendship and the generational impact the movie's had and use it as an opportunity to get more kids involved in all aspects of sports." DiMattia added: "We have all personally benefited from playing sports, learning valuable life skills and building resiliency through competition. If we can pool together the love of The Sandlot, to improve the lives of young people, and level the playing field for kids, it would be special."

"This isn't just something that we wanted to put our names on," Gelt told Popverse at the 30th anniversary. "We are here to work and to hustle and make real impact wherever we can." The organization runs a booth at events like LA Comic Con's Sandlot 30th-anniversary panel — the nostalgia economy converted directly into youth-sports funding. It is the rare celebrity nonprofit that looks like actual work.

The Present: Dugout Dads and Nashville

Gelt remains central to the Sandlot reunion world: the 2023 New Smyrna Beach 30th-anniversary weekend, the LA Comic Con panel, and 2026's Dugout Dads — Patrick Renna and Danielle Fishel's YouTube series reuniting the cast "33 years later," where Gelt appeared in Episode 4 talking about why the project isn't a reboot but "a chance to see the guys together again in a whole new world." His wife works on the crew; the whole thing is a family-and-friends operation.

Based in Nashville, running Masscult's strategy, co-running a nonprofit, showing up for the reunions — Gelt's adult life has the shape of someone who figured out early what he was good at. Not performing; enabling. Not the kid chewing tobacco on the bench; the executive building the agency. The role swap, it turns out, was just the first of several smart trades.

Where Is Grant Gelt Now?

As of 2026, Grant Gelt is Co-Founder & Chief Strategy Officer of Masscult (Nashville), co-founder of the Play Forever nonprofit, and an active Sandlot reunion participant via Dugout Dads and convention panels.

Bertram grew up to run the business — and to give the game back to the kids. From the bench to the boardroom to the nonprofit's front lines: the smartest Sandlot alum, playing the longest game.

The Nashville Move: Why Music City

Masscult's Nashville headquarters is not incidental — it's the thesis. Nashville is where the music industry actually lives now: not just country, but the full apparatus of artist management, publishing, branding, and live entertainment. For Gelt, a former child actor who spent 20+ years learning artist management, creative services, and brand strategy, Nashville is the natural capital — the city where the business he mastered has its densest concentration.

The agency's spread — consumer products, technology, hospitality ventures — reflects how the modern entertainment business works: no longer siloed into "music" or "film" but a mesh of brand, content, and experience. As Chief Strategy Officer, Gelt's job is to see that mesh whole — the skill he started building when he left acting as a teenager and went to learn the machinery instead of performing in front of it.

The through-line from Bertram to boardroom is straighter than it looks. Child acting teaches you the industry's surface; artist management teaches you its engine. Gelt chose the engine at an age when most of his peers were still auditioning — and the twenty-year head start shows. While the reunion circuit trades on what the Sandlot kids were, Gelt's day job trades on what he became: the strategist, the builder, the "smartest" one, keys notwithstanding.

And Play Forever gives the Nashville base its moral center. A music-industry executive funding youth sports through baseball nostalgia — the circles close neatly. The kid who played summer ball on a Utah set in 1992 now makes sure other kids get to play for real. Nashville gave him the platform; the Sandlot gave him the reason.

Then vs Now: Two Chapters

Grant Gelt swapped roles before filming — and swapped careers after it, trading the bench for the boardroom.

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