Which Games Should You Actually Be Watching on Sunday?

There aren’t many things in life that I’m very good at. But the few things I am? You better believe I’ll let you know. Fantasy football is at the top of that list.

My dad taught me the game. He’s been at it for 30 years, and he’s still the greatest fantasy player I’ve ever met. I’ve only been playing for about 10, but in that time I’ve racked up four or five championships. I’m consistently a top team. I win when I want to win. And on the rare occasion I lose? It’s because I decided to. (My disappointing seasons can be counted on one hand.)

So yeah, I’m good at this. (And it makes my friends mad at just how good I actually am — which, honestly, makes it even better)

Naturally, my Sundays are dedicated to American football. Packers on one TV, RedZone on another, multiple screens blazing thanks to Sunday Ticket and YouTube multiview. My dad even bought a rolling TV stand that holds two 55-inch screens so he can wheel out a three-TV setup every Sunday. It’s incredible (but also, are you starting to see just how seriously we take it?).

Once you’ve got three games on one wall, four more on a multiview, and the Packers somewhere in the mix, a question pops up: which games actually matter to me?

The answer, of course, is always: the games my fantasy players are in.

That’s when I noticed my dad had a notebook out, manually writing down every matchup where his starters were playing. I’ve done the same thing—scribbling it out on paper, wasting five minutes on what should be instant. That was the moment I thought: this should be a tool.

The Idea

So I built TuneInFF: tuneinff.jbigs.com

Here’s what it does:

1. You connect your Sleeper or ESPN fantasy football leagues.
2. Hit Scan.
3. It grabs your starters across every league, looks up their matchups for that week, and outputs a clean table.

At a glance, you can see which players you have in each game, which games have the most of your players, and which games you can safely ignore.

No fluff, no extra steps. Just a Sunday morning checklist that tells you exactly which TVs to point your eyeballs at.

(For ESPN leagues, make sure your league settings have the league set as “Viewable to the Public”)

The Build

This was a one-day build. Coffee, laptop, NZE pouches (trying to quit Zyn!), & stubbornness. Sleeper API? Beautiful. Public docs. Publicly accessible. No auth. Easy to use.

ESPN? It doesn’t really exist. Like it does, but not in any public or official capacity. I thought I was hosed until I stumbled upon a random result in Google — a raw amazon aws link… leading to an absolutely incredible API. An API that is literally perfect for this project and at the same time incredibly complex and excessive for my tiny brain.

Before I continue, huge shout out and thanks to Mike Kreiser, creator of the API. I love when other nerds make cool, important, shit and make it available and free to use. Mike — your work is an inspiration. He doesn’t know me, I’ve never talked to him once. Just was able to track down who made the API and thought they deserved some recognition.

Anyway, I scraped Mike’s API and fed it to Cursor. The AI at first acted like how I do when I am assigned a large reading and did not take my ADHD medicine. It seemed like it barely even read it and failed miraculously multiple times to get anything going. It was strange too because Sleeper was easy; but I think the complexity of Mike’s API was a little overwhelming for the little GPT-5-HIGH agent.

So, I reflected on what makes my gears turned and applied it to the AI. I flipped on MCP Tools, gave the AI browser access, and asked it to actually click through the docs itself. Basically, instead of instructing it to do something and simultaneously giving it huge amounts of API documentation as context; I instructed it and gave it an opportunity to navigate the API documentation to find the parts it needed.

Suddenly everything started working. It was like watching a student fail a test, then giving them a calculator, and now they’re a math prodigy.

It taught me something: sometimes AI learns better by doing. Feeding it a ton of text was useless. Giving it the opportunity to discover the context it needed made all the difference.

It’s like how you can hand me the IRS tax code, but I’ll only actually learn once TurboTax holds my hand through the W-2 form. Same deal here.

The Intentional Simplicity

The site is deliberately barebones. No login. No dashboard. No bells or whistles.

Why? Because this isn’t supposed to be another bloated app. It’s a Sunday-morning utility. I wanted it to be as simple as: Wake up. Click a Button. Instantly know which games to put on the TV(s). 

That’s it. No distractions. No wasted time. Just vibes and football.

Lessons Learned

This project felt like the opposite of League Lingo. That one was a heavy build with payments, accounts, databases, newsletters, cron jobs—the works. This? A single-day sprint. Zero cost to run. No need to monetize.

Not every project needs to be a business. Sometimes you just build something cool and put it out for free.

Another lesson: watching AI learn better by doing was eye-opening. Feeding it raw documentation didn’t work. Giving it the ability to actually poke around the docs and figure it out did. That shift was the breakthrough.

Will Anyone Use It?

Honestly? I don’t know.

I shared it with my leagues. They’ll probably use it (or not). I tried posting it to Reddit, but that’s its own mess—my 14-year-old account got hacked, posted porn, and was permanently banned. New account got blocked for “karma minimums.” At this point, I’m over Reddit (it’s an echo-chamber psyop hell hole now anyway).

This might be one of those tools that just quietly exists. Maybe a fantasy nerd stumbles across it and spreads the word. Maybe not.

But here’s the thing: I’m going to use it every single week. And that’s enough for me.

Oh and as for my dad? Turns out his league’s are set to public and he isn’t the commissioner. Also he uses Yahoo Sports for one of his leagues. He will not be using it.

The Bottom Line

TuneInFF is the kind of project I love most: quick build, solves a real pain point, zero fluff. It’s not a business. It’s not a hustle. It’s just a clean little tool that makes football Sundays easier.

Sometimes, that’s all a project needs to be.