The Sideline Stack
Everyone obsesses over what happens on the field.
The real leverage is built on the sidelines.
The Thesis
At its core, what we’re seeing (and actively investing in) is a layer of sports most people overlook.
The systems, services, and infrastructure that support athletes before, during, and after competition.
This isn’t one category. It’s an entire layer of the sports ecosystem that has historically been fragmented and undercapitalized.
It includes:
- Performance + recovery
- Medical + rehab infrastructure
- Data + tracking systems
- Equipment, logistics, and operations
- Staffing layers (trainers, specialists, etcetera)
For years, this has been duct taped together.
That’s changing fast.
Why This Matters Now
Three macro shifts are driving real velocity here:
1. Participation is exploding
More athletes at every level → more strain on systems → more need for infrastructure.
2. Sports is becoming healthcare
Performance, recovery, injury prevention… this is no longer optional.
It’s becoming core to how athletes (and organizations) operate.
3. Technology is finally unlocking scale
What used to be manual is now becoming:
- measurable
- trackable
- monetizable
And once that happens, capital follows.
One of Our Favorite Examples: Ammortal
Ammortal is a perfect example of where this is all going.
They’ve built an immersive performance and recovery system that brings multiple proven modalities into a single, personalized experience designed for how athletes actually prepare and recover.
Not theoretical.
Not “future of.”
It’s already being used at the highest levels.
- On the ground with players during The Masters
- Working directly with elite athletes and teams (click for video)
- Now moving into premium environments like private golf clubs
What stands out:
1. Consolidation of fragmented solutions
Athletes don’t want 9 different vendors.
Ammortal brings it into one system.
2. Real-world adoption at the top
When the best players in the world are using it, that’s signal, not noise.
3. Expansion beyond teams
Private clubs, luxury environments, and curated experiences become distribution.
That’s where it gets really interesting.
Because now you’re not just in sports…
You’re in performance as a lifestyle layer.
Another Layer: Data & the Everyday Athlete
Then you have companies like 18Birdies.
Different angle. Same thesis.
18Birdies sits on the sidelines of the game—but in reality, it’s become part of how the game is played for millions of golfers.
It’s a GPS and performance app on the surface.
But underneath, it’s:
- shot tracking
- course management
- social + engagement
- performance data over time
They support golfers across the spectrum—from junior players to everyday amateurs all the way up to some pros.
I’ve gotten to know Eddy, the founder, pretty well. I won’t share the numbers—but they’re staggering.
What stood out to me:
This is a daily-use product that embeds into the golfer’s workflow.
Not once a month. Not occasionally.
Every round. Every decision. Every shot.
That’s the sideline stack in action.
It’s not visible like a broadcast.
But it’s shaping behavior at scale.
We’re already starting to see this play out beyond sports as well.
In October 2025, Lyft acquired TBR Global Chauffeuring in a 9-figure acquisition.
On the surface, it’s a transportation deal.
It’s not.
It’s infrastructure.
TBR built a premium, behind-the-scenes logistics layer focused on corporate clients, executives, and major sporting events where timing, coordination, and experience actually matter.
Lyft didn’t buy demand.
They bought control over a high value service layer that sits adjacent to the core experience.
That’s the same pattern we’re seeing across sports.
The most valuable companies aren’t always the ones on the field.
They’re the ones supporting, enabling, and upgrading everything around it.
Where We’re Focused
From an investment standpoint, this is where things get interesting.
The best businesses in this category don’t sit on the surface.
They embed deeply.
They become:
- operating systems
- workflow dependencies
- infrastructure layers you can’t rip out
That’s where durability lives.
That’s where multiples get built.
We spend a lot of time around:
- Performance + recovery platforms
- Athlete data + coordination layers
- Healthcare-adjacent infrastructure
- Systems that scale across youth → college → pro
The Bigger Picture
A lot of capital is chasing what’s visible:
- media
- betting
- teams
- fan engagement
But the real opportunity?
Owning the infrastructure behind performance.
Because:
- it compounds
- it embeds
- it scales quietly
- and it’s hard to replace once it’s in
The Sideline Stack isn’t flashy.
But if you control it, you control the game.
