GWTTKB (Guys Who Think They Know Ball) is a free NFL fantasy football and props research site: redraft and dynasty trade calculators, an AI Coach that connects to Sleeper, ESPN and Yahoo leagues, weekly and rest-of-season rankings, True Odds for player props and parlays, and published research built on 4M+ NFL stats and 1M+ sportsbook lines.
Guys Who Think They Know Ball builds the most advanced fantasy football tools in the industry and gives every one of them away free. Rankings shouldn’t cost money. Trade calculators shouldn’t cost money. Advanced stats shouldn’t cost money. With 170M+ views across TikTok and YouTube in its first year and about 150,000 people on the site every month, GWTTKB is arguably the fastest-growing fantasy football advice platform in America.
Player Lines
How every player has done against the number
Every game, every closing line, every condition. How a player has actually performed against the number, with the sample size on everything.
944 players with line histories
— player-games graded
2023–26 seasons
Closing line, every game